Merge branch 'master' into move_timeout_encoding

129 files changed, 3853 insertions, 1768 deletions

diff --git a/src/core/ext/client_config/channel_connectivity.c b/src/core/ext/client_config/channel_connectivity.c
index c1220e3a8c..ce3c13a4ee 100644
--- a/src/core/ext/client_config/channel_connectivity.c
+++ b/src/core/ext/client_config/channel_connectivity.c
@@ -59,7 +59,7 @@ grpc_connectivity_state grpc_channel_check_connectivity_state(
   }
   gpr_log(GPR_ERROR,
           "grpc_channel_check_connectivity_state called on something that is "
-          "not a (u)client channel, but '%s'",
+          "not a client channel, but '%s'",
           client_channel_elem->filter->name);
   grpc_exec_ctx_finish(&exec_ctx);
   return GRPC_CHANNEL_SHUTDOWN;
diff --git a/src/core/ext/transport/chttp2/client/insecure/channel_create.c b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
index 85f9efb3b6..645a011748 100644
--- a/src/core/ext/transport/chttp2/client/insecure/channel_create.c
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
@@ -45,6 +45,7 @@
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/compress_filter.h"
+#include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/channel/http_client_filter.h"
 #include "src/core/lib/iomgr/tcp_client.h"
 #include "src/core/lib/surface/api_trace.h"
@@ -63,6 +64,8 @@ typedef struct {
   grpc_endpoint *tcp;
 
   grpc_closure connected;
+
+  grpc_handshake_manager *handshake_mgr;
 } connector;
 
 static void connector_ref(grpc_connector *con) {
@@ -74,6 +77,7 @@ static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
   connector *c = (connector *)con;
   if (gpr_unref(&c->refs)) {
     /* c->initial_string_buffer does not need to be destroyed */
+    grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
     gpr_free(c);
   }
 }
@@ -83,9 +87,21 @@ static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
   connector_unref(exec_ctx, arg);
 }
 
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
+                              grpc_channel_args *args, void *user_data) {
+  connector *c = user_data;
+  c->result->transport =
+      grpc_create_chttp2_transport(exec_ctx, args, endpoint, 1);
+  GPR_ASSERT(c->result->transport);
+  grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL, 0);
+  c->result->channel_args = args;
+  grpc_closure *notify = c->notify;
+  c->notify = NULL;
+  grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_NONE, NULL);
+}
+
 static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   connector *c = arg;
-  grpc_closure *notify;
   grpc_endpoint *tcp = c->tcp;
   if (tcp != NULL) {
     if (!GPR_SLICE_IS_EMPTY(c->args.initial_connect_string)) {
@@ -97,19 +113,17 @@ static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
       connector_ref(arg);
       grpc_endpoint_write(exec_ctx, tcp, &c->initial_string_buffer,
                           &c->initial_string_sent);
+    } else {
+      grpc_handshake_manager_do_handshake(
+          exec_ctx, c->handshake_mgr, tcp, c->args.channel_args,
+          c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
     }
-    c->result->transport =
-        grpc_create_chttp2_transport(exec_ctx, c->args.channel_args, tcp, 1);
-    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL,
-                                        0);
-    GPR_ASSERT(c->result->transport);
-    c->result->channel_args = grpc_channel_args_copy(c->args.channel_args);
   } else {
     memset(c->result, 0, sizeof(*c->result));
+    grpc_closure *notify = c->notify;
+    c->notify = NULL;
+    grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_REF(error), NULL);
   }
-  notify = c->notify;
-  c->notify = NULL;
-  grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_REF(error), NULL);
 }
 
 static void connector_shutdown(grpc_exec_ctx *exec_ctx, grpc_connector *con) {}
@@ -171,6 +185,7 @@ static grpc_subchannel *client_channel_factory_create_subchannel(
   memset(c, 0, sizeof(*c));
   c->base.vtable = &connector_vtable;
   gpr_ref_init(&c->refs, 1);
+  c->handshake_mgr = grpc_handshake_manager_create();
   args->args = final_args;
   s = grpc_subchannel_create(exec_ctx, &c->base, args);
   grpc_connector_unref(exec_ctx, &c->base);
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
index 9acacbd92d..01d949add3 100644
--- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
@@ -44,6 +44,7 @@
 #include "src/core/ext/client_config/resolver_registry.h"
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/iomgr/tcp_client.h"
 #include "src/core/lib/security/context/security_context.h"
 #include "src/core/lib/security/credentials/credentials.h"
@@ -69,6 +70,11 @@ typedef struct {
   grpc_endpoint *newly_connecting_endpoint;
 
   grpc_closure connected_closure;
+
+  grpc_handshake_manager *handshake_mgr;
+
+  // TODO(roth): Remove once we eliminate on_secure_handshake_done().
+  grpc_channel_args *tmp_args;
 } connector;
 
 static void connector_ref(grpc_connector *con) {
@@ -80,6 +86,8 @@ static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
   connector *c = (connector *)con;
   if (gpr_unref(&c->refs)) {
     /* c->initial_string_buffer does not need to be destroyed */
+    grpc_channel_args_destroy(c->tmp_args);
+    grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr);
     gpr_free(c);
   }
 }
@@ -89,7 +97,6 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
                                      grpc_endpoint *secure_endpoint,
                                      grpc_auth_context *auth_context) {
   connector *c = arg;
-  grpc_closure *notify;
   gpr_mu_lock(&c->mu);
   grpc_error *error = GRPC_ERROR_NONE;
   if (c->connecting_endpoint == NULL) {
@@ -110,25 +117,36 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
     grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL,
                                         0);
     auth_context_arg = grpc_auth_context_to_arg(auth_context);
-    c->result->channel_args = grpc_channel_args_copy_and_add(
-        c->args.channel_args, &auth_context_arg, 1);
+    c->result->channel_args =
+        grpc_channel_args_copy_and_add(c->tmp_args, &auth_context_arg, 1);
   }
-  notify = c->notify;
+  grpc_closure *notify = c->notify;
   c->notify = NULL;
   grpc_exec_ctx_sched(exec_ctx, notify, error, NULL);
 }
 
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
+                              grpc_channel_args *args, void *user_data) {
+  connector *c = user_data;
+  // TODO(roth, jboeuf): Convert security connector handshaking to use new
+  // handshake API, and then move the code from on_secure_handshake_done()
+  // into this function.
+  c->tmp_args = args;
+  grpc_channel_security_connector_do_handshake(exec_ctx, c->security_connector,
+                                               endpoint, c->args.deadline,
+                                               on_secure_handshake_done, c);
+}
+
 static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg,
                                            grpc_error *error) {
   connector *c = arg;
-  grpc_channel_security_connector_do_handshake(
-      exec_ctx, c->security_connector, c->connecting_endpoint, c->args.deadline,
-      on_secure_handshake_done, c);
+  grpc_handshake_manager_do_handshake(
+      exec_ctx, c->handshake_mgr, c->connecting_endpoint, c->args.channel_args,
+      c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
 }
 
 static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   connector *c = arg;
-  grpc_closure *notify;
   grpc_endpoint *tcp = c->newly_connecting_endpoint;
   if (tcp != NULL) {
     gpr_mu_lock(&c->mu);
@@ -144,13 +162,13 @@ static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
       grpc_endpoint_write(exec_ctx, tcp, &c->initial_string_buffer,
                           &c->initial_string_sent);
     } else {
-      grpc_channel_security_connector_do_handshake(
-          exec_ctx, c->security_connector, tcp, c->args.deadline,
-          on_secure_handshake_done, c);
+      grpc_handshake_manager_do_handshake(
+          exec_ctx, c->handshake_mgr, tcp, c->args.channel_args,
+          c->args.deadline, NULL /* acceptor */, on_handshake_done, c);
     }
   } else {
     memset(c->result, 0, sizeof(*c->result));
-    notify = c->notify;
+    grpc_closure *notify = c->notify;
     c->notify = NULL;
     grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_REF(error), NULL);
   }
@@ -229,6 +247,7 @@ static grpc_subchannel *client_channel_factory_create_subchannel(
   memset(c, 0, sizeof(*c));
   c->base.vtable = &connector_vtable;
   c->security_connector = f->security_connector;
+  c->handshake_mgr = grpc_handshake_manager_create();
   gpr_mu_init(&c->mu);
   gpr_ref_init(&c->refs, 1);
   args->args = final_args;
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
index e5c987925c..a33fc93382 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
@@ -37,16 +37,26 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
+
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/channel/http_server_filter.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/tcp_server.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/server.h"
 
-static void new_transport(grpc_exec_ctx *exec_ctx, void *server,
-                          grpc_endpoint *tcp, grpc_pollset *accepting_pollset,
-                          grpc_tcp_server_acceptor *acceptor) {
+typedef struct server_connect_state {
+  grpc_server *server;
+  grpc_pollset *accepting_pollset;
+  grpc_tcp_server_acceptor *acceptor;
+  grpc_handshake_manager *handshake_mgr;
+} server_connect_state;
+
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
+                              grpc_channel_args *args, void *user_data) {
+  server_connect_state *state = user_data;
   /*
    * Beware that the call to grpc_create_chttp2_transport() has to happen before
    * grpc_tcp_server_destroy(). This is fine here, but similar code
@@ -54,18 +64,40 @@ static void new_transport(grpc_exec_ctx *exec_ctx, void *server,
    * (as in server_secure_chttp2.c) needs to add synchronization to avoid this
    * case.
    */
-  grpc_transport *transport = grpc_create_chttp2_transport(
-      exec_ctx, grpc_server_get_channel_args(server), tcp, 0);
-  grpc_server_setup_transport(exec_ctx, server, transport, accepting_pollset,
-                              grpc_server_get_channel_args(server));
+  grpc_transport *transport =
+      grpc_create_chttp2_transport(exec_ctx, args, endpoint, 0);
+  grpc_server_setup_transport(exec_ctx, state->server, transport,
+                              state->accepting_pollset,
+                              grpc_server_get_channel_args(state->server));
   grpc_chttp2_transport_start_reading(exec_ctx, transport, NULL, 0);
+  // Clean up.
+  grpc_channel_args_destroy(args);
+  grpc_handshake_manager_destroy(exec_ctx, state->handshake_mgr);
+  gpr_free(state);
+}
+
+static void on_accept(grpc_exec_ctx *exec_ctx, void *server, grpc_endpoint *tcp,
+                      grpc_pollset *accepting_pollset,
+                      grpc_tcp_server_acceptor *acceptor) {
+  server_connect_state *state = gpr_malloc(sizeof(server_connect_state));
+  state->server = server;
+  state->accepting_pollset = accepting_pollset;
+  state->acceptor = acceptor;
+  state->handshake_mgr = grpc_handshake_manager_create();
+  // TODO(roth): We should really get this timeout value from channel
+  // args instead of hard-coding it.
+  const gpr_timespec deadline = gpr_time_add(
+      gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(120, GPR_TIMESPAN));
+  grpc_handshake_manager_do_handshake(
+      exec_ctx, state->handshake_mgr, tcp, grpc_server_get_channel_args(server),
+      deadline, acceptor, on_handshake_done, state);
 }
 
 /* Server callback: start listening on our ports */
 static void start(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
                   grpc_pollset **pollsets, size_t pollset_count) {
   grpc_tcp_server *tcp = tcpp;
-  grpc_tcp_server_start(exec_ctx, tcp, pollsets, pollset_count, new_transport,
+  grpc_tcp_server_start(exec_ctx, tcp, pollsets, pollset_count, on_accept,
                         server);
 }
 
@@ -74,6 +106,7 @@ static void start(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
 static void destroy(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
                     grpc_closure *destroy_done) {
   grpc_tcp_server *tcp = tcpp;
+  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp);
   grpc_tcp_server_unref(exec_ctx, tcp);
   grpc_exec_ctx_sched(exec_ctx, destroy_done, GRPC_ERROR_NONE, NULL);
 }
diff --git a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
index c42810e913..67e5ee897c 100644
--- a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
@@ -42,6 +42,7 @@
 #include <grpc/support/useful.h>
 #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/channel/http_server_filter.h"
 #include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/resolve_address.h"
@@ -68,6 +69,12 @@ typedef struct server_secure_state {
 typedef struct server_secure_connect {
   server_secure_state *state;
   grpc_pollset *accepting_pollset;
+  grpc_tcp_server_acceptor *acceptor;
+  grpc_handshake_manager *handshake_mgr;
+  // TODO(roth): Remove the following two fields when we eliminate
+  // grpc_server_security_connector_do_handshake().
+  gpr_timespec deadline;
+  grpc_channel_args *args;
 } server_secure_connect;
 
 static void state_ref(server_secure_state *state) { gpr_ref(&state->refcount); }
@@ -97,13 +104,11 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *statep,
         transport = grpc_create_chttp2_transport(
             exec_ctx, grpc_server_get_channel_args(state->state->server),
             secure_endpoint, 0);
-        grpc_channel_args *args_copy;
         grpc_arg args_to_add[2];
         args_to_add[0] = grpc_server_credentials_to_arg(state->state->creds);
         args_to_add[1] = grpc_auth_context_to_arg(auth_context);
-        args_copy = grpc_channel_args_copy_and_add(
-            grpc_server_get_channel_args(state->state->server), args_to_add,
-            GPR_ARRAY_SIZE(args_to_add));
+        grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
+            state->args, args_to_add, GPR_ARRAY_SIZE(args_to_add));
         grpc_server_setup_transport(exec_ctx, state->state->server, transport,
                                     state->accepting_pollset, args_copy);
         grpc_channel_args_destroy(args_copy);
@@ -118,10 +123,25 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *statep,
   } else {
     gpr_log(GPR_ERROR, "Secure transport failed with error %d", status);
   }
+  grpc_channel_args_destroy(state->args);
   state_unref(state->state);
   gpr_free(state);
 }
 
+static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint,
+                              grpc_channel_args *args, void *user_data) {
+  server_secure_connect *state = user_data;
+  // TODO(roth, jboeuf): Convert security connector handshaking to use new
+  // handshake API, and then move the code from on_secure_handshake_done()
+  // into this function.
+  grpc_handshake_manager_destroy(exec_ctx, state->handshake_mgr);
+  state->handshake_mgr = NULL;
+  state->args = args;
+  grpc_server_security_connector_do_handshake(
+      exec_ctx, state->state->sc, state->acceptor, endpoint, state->deadline,
+      on_secure_handshake_done, state);
+}
+
 static void on_accept(grpc_exec_ctx *exec_ctx, void *statep, grpc_endpoint *tcp,
                       grpc_pollset *accepting_pollset,
                       grpc_tcp_server_acceptor *acceptor) {
@@ -129,11 +149,16 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *statep, grpc_endpoint *tcp,
   state->state = statep;
   state_ref(state->state);
   state->accepting_pollset = accepting_pollset;
-  grpc_server_security_connector_do_handshake(
-      exec_ctx, state->state->sc, acceptor, tcp,
-      gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
-                   gpr_time_from_seconds(120, GPR_TIMESPAN)),
-      on_secure_handshake_done, state);
+  state->acceptor = acceptor;
+  state->handshake_mgr = grpc_handshake_manager_create();
+  // TODO(roth): We should really get this timeout value from channel
+  // args instead of hard-coding it.
+  state->deadline = gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
+                                 gpr_time_from_seconds(120, GPR_TIMESPAN));
+  grpc_handshake_manager_do_handshake(
+      exec_ctx, state->handshake_mgr, tcp,
+      grpc_server_get_channel_args(state->state->server), state->deadline,
+      acceptor, on_handshake_done, state);
 }
 
 /* Server callback: start listening on our ports */
@@ -166,6 +191,7 @@ static void destroy(grpc_exec_ctx *exec_ctx, grpc_server *server, void *statep,
   state->destroy_callback = callback;
   tcp = state->tcp;
   gpr_mu_unlock(&state->mu);
+  grpc_tcp_server_shutdown_listeners(exec_ctx, tcp);
   grpc_tcp_server_unref(exec_ctx, tcp);
 }
 
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index a32d45c1c2..6bd65cea02 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -2005,6 +2005,7 @@ static grpc_error *try_http_parsing(grpc_exec_ctx *exec_ctx,
 static void parsing_action(grpc_exec_ctx *exec_ctx, void *arg,
                            grpc_error *error) {
   grpc_chttp2_transport *t = arg;
+  grpc_error *err = GRPC_ERROR_NONE;
   GPR_TIMER_BEGIN("reading_action.parse", 0);
   size_t i = 0;
   grpc_error *errors[3] = {GRPC_ERROR_REF(error), GRPC_ERROR_NONE,
@@ -2013,15 +2014,13 @@ static void parsing_action(grpc_exec_ctx *exec_ctx, void *arg,
     errors[1] = grpc_chttp2_perform_read(exec_ctx, &t->parsing,
                                          t->read_buffer.slices[i]);
   };
-  if (i != t->read_buffer.count) {
+  if (errors[1] == GRPC_ERROR_NONE) {
+    err = GRPC_ERROR_REF(error);
+  } else {
     errors[2] = try_http_parsing(exec_ctx, t);
+    err = GRPC_ERROR_CREATE_REFERENCING("Failed parsing HTTP/2", errors,
+                                        GPR_ARRAY_SIZE(errors));
   }
-  grpc_error *err =
-      errors[0] == GRPC_ERROR_NONE && errors[1] == GRPC_ERROR_NONE &&
-              errors[2] == GRPC_ERROR_NONE
-          ? GRPC_ERROR_NONE
-          : GRPC_ERROR_CREATE_REFERENCING("Failed parsing HTTP/2", errors,
-                                          GPR_ARRAY_SIZE(errors));
   for (i = 0; i < GPR_ARRAY_SIZE(errors); i++) {
     GRPC_ERROR_UNREF(errors[i]);
   }
diff --git a/src/core/lib/channel/channel_args.h b/src/core/lib/channel/channel_args.h
index 653d04f427..aec61ee7c6 100644
--- a/src/core/lib/channel/channel_args.h
+++ b/src/core/lib/channel/channel_args.h
@@ -37,6 +37,8 @@
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 
+// Channel args are intentionally immutable, to avoid the need for locking.
+
 /** Copy the arguments in \a src into a new instance */
 grpc_channel_args *grpc_channel_args_copy(const grpc_channel_args *src);
 
diff --git a/src/core/lib/channel/handshaker.c b/src/core/lib/channel/handshaker.c
new file mode 100644
index 0000000000..b3ee0ed6f9
--- /dev/null
+++ b/src/core/lib/channel/handshaker.c
@@ -0,0 +1,191 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <string.h>
+
+#include <grpc/impl/codegen/alloc.h>
+#include <grpc/impl/codegen/log.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
+
+//
+// grpc_handshaker
+//
+
+void grpc_handshaker_init(const struct grpc_handshaker_vtable* vtable,
+                          grpc_handshaker* handshaker) {
+  handshaker->vtable = vtable;
+}
+
+void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
+                             grpc_handshaker* handshaker) {
+  handshaker->vtable->destroy(exec_ctx, handshaker);
+}
+
+void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
+                              grpc_handshaker* handshaker) {
+  handshaker->vtable->shutdown(exec_ctx, handshaker);
+}
+
+void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
+                                  grpc_handshaker* handshaker,
+                                  grpc_endpoint* endpoint,
+                                  grpc_channel_args* args,
+                                  gpr_timespec deadline,
+                                  grpc_tcp_server_acceptor* acceptor,
+                                  grpc_handshaker_done_cb cb, void* user_data) {
+  handshaker->vtable->do_handshake(exec_ctx, handshaker, endpoint, args,
+                                   deadline, acceptor, cb, user_data);
+}
+
+//
+// grpc_handshake_manager
+//
+
+// State used while chaining handshakers.
+struct grpc_handshaker_state {
+  // The index of the handshaker to invoke next.
+  size_t index;
+  // The deadline for all handshakers.
+  gpr_timespec deadline;
+  // The acceptor to call the handshakers with.
+  grpc_tcp_server_acceptor* acceptor;
+  // The final callback and user_data to invoke after the last handshaker.
+  grpc_handshaker_done_cb final_cb;
+  void* final_user_data;
+};
+
+struct grpc_handshake_manager {
+  // An array of handshakers added via grpc_handshake_manager_add().
+  size_t count;
+  grpc_handshaker** handshakers;
+  // State used while chaining handshakers.
+  struct grpc_handshaker_state* state;
+};
+
+grpc_handshake_manager* grpc_handshake_manager_create() {
+  grpc_handshake_manager* mgr = gpr_malloc(sizeof(grpc_handshake_manager));
+  memset(mgr, 0, sizeof(*mgr));
+  return mgr;
+}
+
+static bool is_power_of_2(size_t n) { return (n & (n - 1)) == 0; }
+
+void grpc_handshake_manager_add(grpc_handshaker* handshaker,
+                                grpc_handshake_manager* mgr) {
+  // To avoid allocating memory for each handshaker we add, we double
+  // the number of elements every time we need more.
+  size_t realloc_count = 0;
+  if (mgr->count == 0) {
+    realloc_count = 2;
+  } else if (mgr->count >= 2 && is_power_of_2(mgr->count)) {
+    realloc_count = mgr->count * 2;
+  }
+  if (realloc_count > 0) {
+    mgr->handshakers =
+        gpr_realloc(mgr->handshakers, realloc_count * sizeof(grpc_handshaker*));
+  }
+  mgr->handshakers[mgr->count++] = handshaker;
+}
+
+void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
+                                    grpc_handshake_manager* mgr) {
+  for (size_t i = 0; i < mgr->count; ++i) {
+    grpc_handshaker_destroy(exec_ctx, mgr->handshakers[i]);
+  }
+  gpr_free(mgr->handshakers);
+  gpr_free(mgr);
+}
+
+void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
+                                     grpc_handshake_manager* mgr) {
+  // FIXME: maybe check which handshaker is currently in progress, and
+  // only shut down that one?
+  for (size_t i = 0; i < mgr->count; ++i) {
+    grpc_handshaker_shutdown(exec_ctx, mgr->handshakers[i]);
+  }
+  if (mgr->state != NULL) {
+    gpr_free(mgr->state);
+    mgr->state = NULL;
+  }
+}
+
+// A function used as the handshaker-done callback when chaining
+// handshakers together.
+static void call_next_handshaker(grpc_exec_ctx* exec_ctx,
+                                 grpc_endpoint* endpoint,
+                                 grpc_channel_args* args, void* user_data) {
+  grpc_handshake_manager* mgr = user_data;
+  GPR_ASSERT(mgr->state != NULL);
+  GPR_ASSERT(mgr->state->index < mgr->count);
+  grpc_handshaker_done_cb cb = call_next_handshaker;
+  // If this is the last handshaker, use the caller-supplied callback
+  // and user_data instead of chaining back to this function again.
+  if (mgr->state->index == mgr->count - 1) {
+    cb = mgr->state->final_cb;
+    user_data = mgr->state->final_user_data;
+  }
+  // Invoke handshaker.
+  grpc_handshaker_do_handshake(exec_ctx, mgr->handshakers[mgr->state->index],
+                               endpoint, args, mgr->state->deadline,
+                               mgr->state->acceptor, cb, user_data);
+  ++mgr->state->index;
+  // If this is the last handshaker, clean up state.
+  if (mgr->state->index == mgr->count) {
+    gpr_free(mgr->state);
+    mgr->state = NULL;
+  }
+}
+
+void grpc_handshake_manager_do_handshake(
+    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
+    grpc_endpoint* endpoint, const grpc_channel_args* args,
+    gpr_timespec deadline, grpc_tcp_server_acceptor* acceptor,
+    grpc_handshaker_done_cb cb, void* user_data) {
+  grpc_channel_args* args_copy = grpc_channel_args_copy(args);
+  if (mgr->count == 0) {
+    // No handshakers registered, so we just immediately call the done
+    // callback with the passed-in endpoint.
+    cb(exec_ctx, endpoint, args_copy, user_data);
+  } else {
+    GPR_ASSERT(mgr->state == NULL);
+    mgr->state = gpr_malloc(sizeof(struct grpc_handshaker_state));
+    memset(mgr->state, 0, sizeof(*mgr->state));
+    mgr->state->deadline = deadline;
+    mgr->state->acceptor = acceptor;
+    mgr->state->final_cb = cb;
+    mgr->state->final_user_data = user_data;
+    call_next_handshaker(exec_ctx, endpoint, args_copy, mgr);
+  }
+}
diff --git a/src/core/lib/channel/handshaker.h b/src/core/lib/channel/handshaker.h
new file mode 100644
index 0000000000..b1e91dba4f
--- /dev/null
+++ b/src/core/lib/channel/handshaker.h
@@ -0,0 +1,145 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H
+#define GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H
+
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/impl/codegen/time.h>
+
+#include "src/core/lib/iomgr/closure.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+
+/// Handshakers are used to perform initial handshakes on a connection
+/// before the client sends the initial request.  Some examples of what
+/// a handshaker can be used for includes support for HTTP CONNECT on
+/// the client side and various types of security initialization.
+///
+/// In general, handshakers should be used via a handshake manager.
+
+///
+/// grpc_handshaker
+///
+
+typedef struct grpc_handshaker grpc_handshaker;
+
+/// Callback type invoked when a handshaker is done.
+/// Takes ownership of \a args.
+typedef void (*grpc_handshaker_done_cb)(grpc_exec_ctx* exec_ctx,
+                                        grpc_endpoint* endpoint,
+                                        grpc_channel_args* args,
+                                        void* user_data);
+
+struct grpc_handshaker_vtable {
+  /// Destroys the handshaker.
+  void (*destroy)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker);
+
+  /// Shuts down the handshaker (e.g., to clean up when the operation is
+  /// aborted in the middle).
+  void (*shutdown)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker);
+
+  /// Performs handshaking.  When finished, calls \a cb with \a user_data.
+  /// Takes ownership of \a args.
+  /// \a acceptor will be NULL for client-side handshakers.
+  void (*do_handshake)(grpc_exec_ctx* exec_ctx, grpc_handshaker* handshaker,
+                       grpc_endpoint* endpoint, grpc_channel_args* args,
+                       gpr_timespec deadline,
+                       grpc_tcp_server_acceptor* acceptor,
+                       grpc_handshaker_done_cb cb, void* user_data);
+};
+
+/// Base struct.  To subclass, make this the first member of the
+/// implementation struct.
+struct grpc_handshaker {
+  const struct grpc_handshaker_vtable* vtable;
+};
+
+/// Called by concrete implementations to initialize the base struct.
+void grpc_handshaker_init(const struct grpc_handshaker_vtable* vtable,
+                          grpc_handshaker* handshaker);
+
+/// Convenient wrappers for invoking methods via the vtable.
+/// These probably do not need to be called from anywhere but
+/// grpc_handshake_manager.
+void grpc_handshaker_destroy(grpc_exec_ctx* exec_ctx,
+                             grpc_handshaker* handshaker);
+void grpc_handshaker_shutdown(grpc_exec_ctx* exec_ctx,
+                              grpc_handshaker* handshaker);
+void grpc_handshaker_do_handshake(grpc_exec_ctx* exec_ctx,
+                                  grpc_handshaker* handshaker,
+                                  grpc_endpoint* endpoint,
+                                  grpc_channel_args* args,
+                                  gpr_timespec deadline,
+                                  grpc_tcp_server_acceptor* acceptor,
+                                  grpc_handshaker_done_cb cb, void* user_data);
+
+///
+/// grpc_handshake_manager
+///
+
+typedef struct grpc_handshake_manager grpc_handshake_manager;
+
+/// Creates a new handshake manager.  Caller takes ownership.
+grpc_handshake_manager* grpc_handshake_manager_create();
+
+/// Adds a handshaker to the handshake manager.
+/// Takes ownership of \a mgr.
+void grpc_handshake_manager_add(grpc_handshaker* handshaker,
+                                grpc_handshake_manager* mgr);
+
+/// Destroys the handshake manager.
+void grpc_handshake_manager_destroy(grpc_exec_ctx* exec_ctx,
+                                    grpc_handshake_manager* mgr);
+
+/// Shuts down the handshake manager (e.g., to clean up when the operation is
+/// aborted in the middle).
+/// The caller must still call grpc_handshake_manager_destroy() after
+/// calling this function.
+void grpc_handshake_manager_shutdown(grpc_exec_ctx* exec_ctx,
+                                     grpc_handshake_manager* mgr);
+
+/// Invokes handshakers in the order they were added.
+/// Does NOT take ownership of \a args.  Instead, makes a copy before
+/// invoking the first handshaker.
+/// \a acceptor will be NULL for client-side handshakers.
+/// If successful, invokes \a cb with \a user_data after all handshakers
+/// have completed.
+void grpc_handshake_manager_do_handshake(
+    grpc_exec_ctx* exec_ctx, grpc_handshake_manager* mgr,
+    grpc_endpoint* endpoint, const grpc_channel_args* args,
+    gpr_timespec deadline, grpc_tcp_server_acceptor* acceptor,
+    grpc_handshaker_done_cb cb, void* user_data);
+
+#endif /* GRPC_CORE_LIB_CHANNEL_HANDSHAKER_H */
diff --git a/src/core/lib/iomgr/ev_poll_posix.c b/src/core/lib/iomgr/ev_poll_posix.c
index 4b593f4b2c..16a5e3083e 100644
--- a/src/core/lib/iomgr/ev_poll_posix.c
+++ b/src/core/lib/iomgr/ev_poll_posix.c
@@ -844,6 +844,11 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   *worker_hdl = &worker;
   grpc_error *error = GRPC_ERROR_NONE;
 
+  /* Avoid malloc for small number of elements. */
+  enum { inline_elements = 96 };
+  struct pollfd pollfd_space[inline_elements];
+  struct grpc_fd_watcher watcher_space[inline_elements];
+
   /* pollset->mu already held */
   int added_worker = 0;
   int locked = 1;
@@ -899,15 +904,23 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
       int r;
       size_t i, fd_count;
       nfds_t pfd_count;
-      /* TODO(ctiller): inline some elements to avoid an allocation */
       grpc_fd_watcher *watchers;
       struct pollfd *pfds;
 
       timeout = poll_deadline_to_millis_timeout(deadline, now);
-      /* TODO(ctiller): perform just one malloc here if we exceed the inline
-       * case */
-      pfds = gpr_malloc(sizeof(*pfds) * (pollset->fd_count + 2));
-      watchers = gpr_malloc(sizeof(*watchers) * (pollset->fd_count + 2));
+
+      if (pollset->fd_count + 2 <= inline_elements) {
+        pfds = pollfd_space;
+        watchers = watcher_space;
+      } else {
+        /* Allocate one buffer to hold both pfds and watchers arrays */
+        const size_t pfd_size = sizeof(*pfds) * (pollset->fd_count + 2);
+        const size_t watch_size = sizeof(*watchers) * (pollset->fd_count + 2);
+        void *buf = gpr_malloc(pfd_size + watch_size);
+        pfds = buf;
+        watchers = (void *)((char *)buf + pfd_size);
+      }
+
       fd_count = 0;
       pfd_count = 2;
       pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
@@ -974,8 +987,11 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
         }
       }
 
-      gpr_free(pfds);
-      gpr_free(watchers);
+      if (pfds != pollfd_space) {
+        /* pfds and watchers are in the same memory block pointed to by pfds */
+        gpr_free(pfds);
+      }
+
       GPR_TIMER_END("maybe_work_and_unlock", 0);
       locked = 0;
     } else {
diff --git a/src/core/lib/iomgr/network_status_tracker.c b/src/core/lib/iomgr/network_status_tracker.c
index 90c074b007..b4bb7e3cf7 100644
--- a/src/core/lib/iomgr/network_status_tracker.c
+++ b/src/core/lib/iomgr/network_status_tracker.c
@@ -56,6 +56,15 @@ void grpc_network_status_init(void) {
   // TODO(makarandd): Install callback with OS to monitor network status.
 }
 
+void grpc_destroy_network_status_monitor() {
+  for (endpoint_ll_node *curr = head; curr != NULL;) {
+    endpoint_ll_node *next = curr->next;
+    gpr_free(curr);
+    curr = next;
+  }
+  gpr_mu_destroy(&g_endpoint_mutex);
+}
+
 void grpc_network_status_register_endpoint(grpc_endpoint *ep) {
   gpr_mu_lock(&g_endpoint_mutex);
   if (head == NULL) {
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
index 875a6ca14a..5a25d39a0c 100644
--- a/src/core/lib/iomgr/tcp_server.h
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -105,4 +105,8 @@ void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s,
    a call (exec_ctx!=NULL) to shutdown_complete. */
 void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s);
 
+/* Shutdown the fds of listeners. */
+void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx *exec_ctx,
+                                        grpc_tcp_server *s);
+
 #endif /* GRPC_CORE_LIB_IOMGR_TCP_SERVER_H */
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index cb2ff782d6..38ebd2dbcb 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -741,4 +741,17 @@ void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   }
 }
 
+void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx *exec_ctx,
+                                        grpc_tcp_server *s) {
+  gpr_mu_lock(&s->mu);
+  /* shutdown all fd's */
+  if (s->active_ports) {
+    grpc_tcp_listener *sp;
+    for (sp = s->head; sp; sp = sp->next) {
+      grpc_fd_shutdown(exec_ctx, sp->emfd);
+    }
+  }
+  gpr_mu_unlock(&s->mu);
+}
+
 #endif
diff --git a/src/core/lib/iomgr/tcp_server_windows.c b/src/core/lib/iomgr/tcp_server_windows.c
index 7b0966704c..1b125e7005 100644
--- a/src/core/lib/iomgr/tcp_server_windows.c
+++ b/src/core/lib/iomgr/tcp_server_windows.c
@@ -540,4 +540,7 @@ void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s,
   gpr_mu_unlock(&s->mu);
 }
 
+void grpc_tcp_server_shutdown_listeners(grpc_exec_ctx *exec_ctx,
+                                        grpc_tcp_server *s) {}
+
 #endif /* GPR_WINSOCK_SOCKET */
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 1ebccf2ee2..48032412a2 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -60,6 +60,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
+#include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
@@ -128,7 +129,7 @@ grpc_udp_server *grpc_udp_server_create(void) {
 }
 
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_udp_server *s) {
-  grpc_exec_ctx_enqueue(exec_ctx, s->shutdown_complete, 1, NULL);
+  grpc_exec_ctx_sched(exec_ctx, s->shutdown_complete, GRPC_ERROR_NONE, NULL);
 
   gpr_mu_destroy(&s->mu);
   gpr_cv_destroy(&s->cv);
@@ -138,7 +139,7 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_udp_server *s) {
 }
 
 static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server,
-                           bool success) {
+                           grpc_error *error) {
   grpc_udp_server *s = server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
@@ -217,14 +218,23 @@ static int prepare_socket(int fd, const struct sockaddr *addr,
     goto error;
   }
 
-  if (!grpc_set_socket_nonblocking(fd, 1) || !grpc_set_socket_cloexec(fd, 1)) {
-    gpr_log(GPR_ERROR, "Unable to configure socket %d: %s", fd,
-            strerror(errno));
+  if (grpc_set_socket_nonblocking(fd, 1) != GRPC_ERROR_NONE) {
+    gpr_log(GPR_ERROR, "Unable to set nonblocking %d: %s", fd, strerror(errno));
+    goto error;
+  }
+  if (grpc_set_socket_cloexec(fd, 1) != GRPC_ERROR_NONE) {
+    gpr_log(GPR_ERROR, "Unable to set cloexec %d: %s", fd, strerror(errno));
+    goto error;
   }
 
-  if (grpc_set_socket_ip_pktinfo_if_possible(fd) &&
-      addr->sa_family == AF_INET6) {
-    grpc_set_socket_ipv6_recvpktinfo_if_possible(fd);
+  if (grpc_set_socket_ip_pktinfo_if_possible(fd) != GRPC_ERROR_NONE) {
+    gpr_log(GPR_ERROR, "Unable to set ip_pktinfo.");
+    goto error;
+  } else if (addr->sa_family == AF_INET6) {
+    if (grpc_set_socket_ipv6_recvpktinfo_if_possible(fd) != GRPC_ERROR_NONE) {
+      gpr_log(GPR_ERROR, "Unable to set ipv6_recvpktinfo.");
+      goto error;
+    }
   }
 
   GPR_ASSERT(addr_len < ~(socklen_t)0);
@@ -241,13 +251,13 @@ static int prepare_socket(int fd, const struct sockaddr *addr,
     goto error;
   }
 
-  if (!grpc_set_socket_sndbuf(fd, buffer_size_bytes)) {
+  if (grpc_set_socket_sndbuf(fd, buffer_size_bytes) != GRPC_ERROR_NONE) {
     gpr_log(GPR_ERROR, "Failed to set send buffer size to %d bytes",
             buffer_size_bytes);
     goto error;
   }
 
-  if (!grpc_set_socket_rcvbuf(fd, buffer_size_bytes)) {
+  if (grpc_set_socket_rcvbuf(fd, buffer_size_bytes) != GRPC_ERROR_NONE) {
     gpr_log(GPR_ERROR, "Failed to set receive buffer size to %d bytes",
             buffer_size_bytes);
     goto error;
@@ -263,10 +273,10 @@ error:
 }
 
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
+static void on_read(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   server_port *sp = arg;
 
-  if (!success) {
+  if (error != GRPC_ERROR_NONE) {
     gpr_mu_lock(&sp->server->mu);
     if (0 == --sp->server->active_ports) {
       gpr_mu_unlock(&sp->server->mu);
@@ -369,7 +379,8 @@ int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
     /* Try listening on IPv6 first. */
     addr = (struct sockaddr *)&wild6;
     addr_len = sizeof(wild6);
-    fd = grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode);
+    // TODO(rjshade): Test and propagate the returned grpc_error*:
+    grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode, &fd);
     allocated_port1 =
         add_socket_to_server(s, fd, addr, addr_len, read_cb, orphan_cb);
     if (fd >= 0 && dsmode == GRPC_DSMODE_DUALSTACK) {
@@ -384,7 +395,8 @@ int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
     addr_len = sizeof(wild4);
   }
 
-  fd = grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode);
+  // TODO(rjshade): Test and propagate the returned grpc_error*:
+  grpc_create_dualstack_socket(addr, SOCK_DGRAM, IPPROTO_UDP, &dsmode, &fd);
   if (fd < 0) {
     gpr_log(GPR_ERROR, "Unable to create socket: %s", strerror(errno));
   }
diff --git a/src/core/lib/support/log.c b/src/core/lib/support/log.c
index bae0957df7..899f1218b6 100644
--- a/src/core/lib/support/log.c
+++ b/src/core/lib/support/log.c
@@ -79,17 +79,18 @@ void gpr_set_log_verbosity(gpr_log_severity min_severity_to_print) {
 
 void gpr_log_verbosity_init() {
   char *verbosity = gpr_getenv("GRPC_VERBOSITY");
-  if (verbosity == NULL) return;
 
-  gpr_atm min_severity_to_print = GPR_LOG_VERBOSITY_UNSET;
-  if (strcmp(verbosity, "DEBUG") == 0) {
-    min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_DEBUG;
-  } else if (strcmp(verbosity, "INFO") == 0) {
-    min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_INFO;
-  } else if (strcmp(verbosity, "ERROR") == 0) {
-    min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_ERROR;
+  gpr_atm min_severity_to_print = GPR_LOG_SEVERITY_ERROR;
+  if (verbosity != NULL) {
+    if (strcmp(verbosity, "DEBUG") == 0) {
+      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_DEBUG;
+    } else if (strcmp(verbosity, "INFO") == 0) {
+      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_INFO;
+    } else if (strcmp(verbosity, "ERROR") == 0) {
+      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_ERROR;
+    }
+    gpr_free(verbosity);
   }
-  gpr_free(verbosity);
   if ((gpr_atm_no_barrier_load(&g_min_severity_to_print)) ==
       GPR_LOG_VERBOSITY_UNSET) {
     gpr_atm_no_barrier_store(&g_min_severity_to_print, min_severity_to_print);
diff --git a/src/core/lib/support/slice.c b/src/core/lib/support/slice.c
index b9a7c77bda..8a2c0a9086 100644
--- a/src/core/lib/support/slice.c
+++ b/src/core/lib/support/slice.c
@@ -94,14 +94,16 @@ static void new_slice_unref(void *p) {
   }
 }
 
-gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *)) {
+gpr_slice gpr_slice_new_with_user_data(void *p, size_t len,
+                                       void (*destroy)(void *),
+                                       void *user_data) {
   gpr_slice slice;
   new_slice_refcount *rc = gpr_malloc(sizeof(new_slice_refcount));
   gpr_ref_init(&rc->refs, 1);
   rc->rc.ref = new_slice_ref;
   rc->rc.unref = new_slice_unref;
   rc->user_destroy = destroy;
-  rc->user_data = p;
+  rc->user_data = user_data;
 
   slice.refcount = &rc->rc;
   slice.data.refcounted.bytes = p;
@@ -109,6 +111,11 @@ gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *)) {
   return slice;
 }
 
+gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *)) {
+  /* Pass "p" to *destroy when the slice is no longer needed. */
+  return gpr_slice_new_with_user_data(p, len, destroy, p);
+}
+
 /* gpr_slice_new_with_len support structures - we create a refcount object
    extended with the user provided data pointer & destroy function */
 typedef struct new_with_len_slice_refcount {
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index 08c0a237c9..e33fc5c761 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -138,7 +138,7 @@ typedef struct grpc_transport_stream_op {
   /** If != GRPC_ERROR_NONE, cancel this stream */
   grpc_error *cancel_error;
 
-  /** If != GRPC_ERROR, send grpc-status, grpc-message, and close this
+  /** If != GRPC_ERROR_NONE, send grpc-status, grpc-message, and close this
       stream for both reading and writing */
   grpc_error *close_error;
 
diff --git a/src/cpp/ext/proto_server_reflection.h b/src/cpp/ext/proto_server_reflection.h
index 23c130513d..f66f3c2c9a 100644
--- a/src/cpp/ext/proto_server_reflection.h
+++ b/src/cpp/ext/proto_server_reflection.h
@@ -30,13 +30,31 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+
+/*
+  - If the generated header `grpc++/ext/reflection.grpc.pb.h` needs to be
+    installed, target `grpc++_reflection` in `build.yaml` should use the
+    filegroup `grpc++_reflection_proto`, and GRPC_NO_GENERATED_CODE should not
+    be defined.
+  - If the server reflection library needs to generate `reflection.grpc.pb.h`
+    from `reflection.proto` at compile time, the generated header
+    `grpc++/ext/reflection.grpc.pb.h` should not be installed. In this case,
+    target `grpc++_reflection` should depend on `grpc++_reflection_codegen`, and
+    GRPC_NO_GENERATED_CODE should be defined.
+*/
+
 #ifndef GRPC_INTERNAL_CPP_EXT_PROTO_SERVER_REFLECTION_H
 #define GRPC_INTERNAL_CPP_EXT_PROTO_SERVER_REFLECTION_H
 
 #include <unordered_set>
 #include <vector>
 
+// GRPC_NO_GENERATED_CODE indicates generated pb files should not be used
+#ifdef GRPC_NO_GENERATED_CODE
+#include "src/proto/grpc/reflection/v1alpha/reflection.grpc.pb.h"
+#else
 #include <grpc++/ext/reflection.grpc.pb.h>
+#endif  // GRPC_NO_GENERATED_CODE
 #include <grpc++/grpc++.h>
 
 namespace grpc {
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index f58bcbb515..d4c9a2ef31 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -14,10 +14,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -33,10 +33,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
index 47593f787b..543549eb2d 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ b/src/csharp/Grpc.Core/Grpc.Core.nuspec
@@ -25,11 +25,11 @@
     <file src="**\*.cs" target="src" />
     <file src="Grpc.Core.targets" target="\build\net45\Grpc.Core.targets" />
     <!-- without backslashes in the the source path, nuget won't copy the files -->
-    <file src="..\nativelibs\windows_x86\grpc_csharp_ext.dll" target="/build/native/bin/windows_x86/grpc_csharp_ext.dll" />
-    <file src="..\nativelibs\windows_x64\grpc_csharp_ext.dll" target="/build/native/bin/windows_x64/grpc_csharp_ext.dll" />
-    <file src="..\nativelibs\linux_x86\libgrpc_csharp_ext.so" target="/build/native/bin/linux_x86/libgrpc_csharp_ext.so" />
-    <file src="..\nativelibs\linux_x64\libgrpc_csharp_ext.so" target="/build/native/bin/linux_x64/libgrpc_csharp_ext.so" />
-    <file src="..\nativelibs\macosx_x86\libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x86/libgrpc_csharp_ext.dylib" />
-    <file src="..\nativelibs\macosx_x64\libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x64/libgrpc_csharp_ext.dylib" />
+    <file src="..\nativelibs\windows_x86\grpc_csharp_ext.dll" target="/runtimes/win/native/grpc_csharp_ext.x86.dll" />
+    <file src="..\nativelibs\windows_x64\grpc_csharp_ext.dll" target="/runtimes/win/native/grpc_csharp_ext.x64.dll" />
+    <file src="..\nativelibs\linux_x86\libgrpc_csharp_ext.so" target="/runtimes/linux/native/libgrpc_csharp_ext.x86.so" />
+    <file src="..\nativelibs\linux_x64\libgrpc_csharp_ext.so" target="/runtimes/linux/native/libgrpc_csharp_ext.x64.so" />
+    <file src="..\nativelibs\macosx_x86\libgrpc_csharp_ext.dylib" target="/runtimes/osx/native/libgrpc_csharp_ext.x86.dylib" />
+    <file src="..\nativelibs\macosx_x64\libgrpc_csharp_ext.dylib" target="/runtimes/osx/native/libgrpc_csharp_ext.x64.dylib" />
   </files>
 </package>
diff --git a/src/csharp/Grpc.Core/Grpc.Core.targets b/src/csharp/Grpc.Core/Grpc.Core.targets
index 501fc50548..3367d51a80 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.targets
+++ b/src/csharp/Grpc.Core/Grpc.Core.targets
@@ -1,29 +1,29 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\build\native\bin\windows_x86\grpc_csharp_ext.dll">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\win\native\grpc_csharp_ext.x86.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\windows_x86\grpc_csharp_ext.dll</Link>
+      <Link>grpc_csharp_ext.x86.dll</Link>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\build\native\bin\windows_x64\grpc_csharp_ext.dll">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\win\native\grpc_csharp_ext.x64.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\windows_x64\grpc_csharp_ext.dll</Link>
+      <Link>grpc_csharp_ext.x64.dll</Link>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\build\native\bin\linux_x86\libgrpc_csharp_ext.so">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\linux\native\libgrpc_csharp_ext.x86.so">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\linux_x86\libgrpc_csharp_ext.so</Link>
+      <Link>libgrpc_csharp_ext.x86.so</Link>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\build\native\bin\linux_x64\libgrpc_csharp_ext.so">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\linux\native\libgrpc_csharp_ext.x64.so">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\linux_x64\libgrpc_csharp_ext.so</Link>
+      <Link>libgrpc_csharp_ext.x64.so</Link>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\build\native\bin\macosx_x86\libgrpc_csharp_ext.dylib">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\osx\native\libgrpc_csharp_ext.x86.dylib">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\macosx_x86\libgrpc_csharp_ext.dylib</Link>
+      <Link>libgrpc_csharp_ext.x86.dylib</Link>
     </Content>
-    <Content Include="$(MSBuildThisFileDirectory)..\..\build\native\bin\macosx_x64\libgrpc_csharp_ext.dylib">
+    <Content Include="$(MSBuildThisFileDirectory)..\..\runtimes\osx\native\libgrpc_csharp_ext.x64.dylib">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\macosx_x64\libgrpc_csharp_ext.dylib</Link>
+      <Link>libgrpc_csharp_ext.x64.dylib</Link>
     </Content>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index a6d7925816..509baf7cb1 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -44,9 +44,6 @@ namespace Grpc.Core.Internal
     /// </summary>
     internal sealed class NativeExtension
     {
-        const string NativeLibrariesDir = "nativelibs";
-        const string DnxStyleNativeLibrariesDir = "../../build/native/bin/";
-
         static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<NativeExtension>();
         static readonly object staticLock = new object();
         static volatile NativeExtension instance;
@@ -98,20 +95,25 @@ namespace Grpc.Core.Internal
         private static UnmanagedLibrary Load()
         {
             // TODO: allow customizing path to native extension (possibly through exposing a GrpcEnvironment property).
-
-            var libraryFlavor = string.Format("{0}_{1}", GetPlatformString(), GetArchitectureString());
-
+            // See https://github.com/grpc/grpc/pull/7303 for one option.
             var assemblyDirectory = Path.GetDirectoryName(GetAssemblyPath());
 
             // With old-style VS projects, the native libraries get copied using a .targets rule to the build output folder
             // alongside the compiled assembly.
-            var classicPath = Path.Combine(assemblyDirectory, NativeLibrariesDir, libraryFlavor, GetNativeLibraryFilename());
+            // With dotnet cli projects, the native libraries (just the required ones) are similarly copied to the built output folder,
+            // through the magic of Microsoft.NETCore.Platforms.
+            var classicPath = Path.Combine(assemblyDirectory, GetNativeLibraryFilename());
 
             // DNX-style project.json projects will use Grpc.Core assembly directly in the location where it got restored
             // by nuget. We locate the native libraries based on known structure of Grpc.Core nuget package.
-            var dnxStylePath = Path.Combine(assemblyDirectory, DnxStyleNativeLibrariesDir, libraryFlavor, GetNativeLibraryFilename());
 
-            return new UnmanagedLibrary(new string[] {classicPath, dnxStylePath});
+            // TODO: Support .NET Core applications, which act slightly differently. We may be okay if "dotnet publish"
+            // is used, but "dotnet run" leaves the native libraries in-package, while copying assemblies.
+            string platform = GetPlatformString();
+            string relativeDirectory = string.Format("../../runtimes/{0}/native", platform);
+            var dnxStylePath = Path.Combine(assemblyDirectory, relativeDirectory, GetNativeLibraryFilename());
+            string[] paths = new[] { classicPath, dnxStylePath };
+            return new UnmanagedLibrary(paths);
         }
 
         private static string GetAssemblyPath()
@@ -147,7 +149,7 @@ namespace Grpc.Core.Internal
         {
             if (PlatformApis.IsWindows)
             {
-                return "windows";
+                return "win";
             }
             if (PlatformApis.IsLinux)
             {
@@ -155,7 +157,7 @@ namespace Grpc.Core.Internal
             }
             if (PlatformApis.IsMacOSX)
             {
-                return "macosx";
+                return "osx";
             }
             throw new InvalidOperationException("Unsupported platform.");
         }
@@ -176,17 +178,18 @@ namespace Grpc.Core.Internal
         // platform specific file name of the extension library
         private static string GetNativeLibraryFilename()
         {
+            string architecture = GetArchitectureString();
             if (PlatformApis.IsWindows)
             {
-                return "grpc_csharp_ext.dll";
+                return string.Format("grpc_csharp_ext.{0}.dll", architecture);
             }
             if (PlatformApis.IsLinux)
             {
-                return "libgrpc_csharp_ext.so";
+                return string.Format("libgrpc_csharp_ext.{0}.so", architecture);
             }
             if (PlatformApis.IsMacOSX)
             {
-                return "libgrpc_csharp_ext.dylib";
+                return string.Format("libgrpc_csharp_ext.{0}.dylib", architecture);
             }
             throw new InvalidOperationException("Unsupported platform.");
         }
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 65607ed120..f457c9dbf1 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -159,215 +159,107 @@ namespace Grpc.Core.Internal
 
         public NativeMethods(UnmanagedLibrary library)
         {
-            if (PlatformApis.IsLinux || PlatformApis.IsMacOSX)
-            {
-                this.grpcsharp_init = GetMethodDelegate<Delegates.grpcsharp_init_delegate>(library);
-                this.grpcsharp_shutdown = GetMethodDelegate<Delegates.grpcsharp_shutdown_delegate>(library);
-                this.grpcsharp_version_string = GetMethodDelegate<Delegates.grpcsharp_version_string_delegate>(library);
-
-                this.grpcsharp_batch_context_create = GetMethodDelegate<Delegates.grpcsharp_batch_context_create_delegate>(library);
-                this.grpcsharp_batch_context_recv_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_initial_metadata_delegate>(library);
-                this.grpcsharp_batch_context_recv_message_length = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_message_length_delegate>(library);
-                this.grpcsharp_batch_context_recv_message_to_buffer = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_message_to_buffer_delegate>(library);
-                this.grpcsharp_batch_context_recv_status_on_client_status = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_status_delegate>(library);
-                this.grpcsharp_batch_context_recv_status_on_client_details = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_details_delegate>(library);
-                this.grpcsharp_batch_context_recv_status_on_client_trailing_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_trailing_metadata_delegate>(library);
-                this.grpcsharp_batch_context_server_rpc_new_call = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_call_delegate>(library);
-                this.grpcsharp_batch_context_server_rpc_new_method = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_method_delegate>(library);
-                this.grpcsharp_batch_context_server_rpc_new_host = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_host_delegate>(library);
-                this.grpcsharp_batch_context_server_rpc_new_deadline = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_deadline_delegate>(library);
-                this.grpcsharp_batch_context_server_rpc_new_request_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_request_metadata_delegate>(library);
-                this.grpcsharp_batch_context_recv_close_on_server_cancelled = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_close_on_server_cancelled_delegate>(library);
-                this.grpcsharp_batch_context_destroy = GetMethodDelegate<Delegates.grpcsharp_batch_context_destroy_delegate>(library);
-
-                this.grpcsharp_composite_call_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_call_credentials_create_delegate>(library);
-                this.grpcsharp_call_credentials_release = GetMethodDelegate<Delegates.grpcsharp_call_credentials_release_delegate>(library);
-
-                this.grpcsharp_call_cancel = GetMethodDelegate<Delegates.grpcsharp_call_cancel_delegate>(library);
-                this.grpcsharp_call_cancel_with_status = GetMethodDelegate<Delegates.grpcsharp_call_cancel_with_status_delegate>(library);
-                this.grpcsharp_call_start_unary = GetMethodDelegate<Delegates.grpcsharp_call_start_unary_delegate>(library);
-                this.grpcsharp_call_start_client_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_client_streaming_delegate>(library);
-                this.grpcsharp_call_start_server_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_server_streaming_delegate>(library);
-                this.grpcsharp_call_start_duplex_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_duplex_streaming_delegate>(library);
-                this.grpcsharp_call_send_message = GetMethodDelegate<Delegates.grpcsharp_call_send_message_delegate>(library);
-                this.grpcsharp_call_send_close_from_client = GetMethodDelegate<Delegates.grpcsharp_call_send_close_from_client_delegate>(library);
-                this.grpcsharp_call_send_status_from_server = GetMethodDelegate<Delegates.grpcsharp_call_send_status_from_server_delegate>(library);
-                this.grpcsharp_call_recv_message = GetMethodDelegate<Delegates.grpcsharp_call_recv_message_delegate>(library);
-                this.grpcsharp_call_recv_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_call_recv_initial_metadata_delegate>(library);
-                this.grpcsharp_call_start_serverside = GetMethodDelegate<Delegates.grpcsharp_call_start_serverside_delegate>(library);
-                this.grpcsharp_call_send_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_call_send_initial_metadata_delegate>(library);
-                this.grpcsharp_call_set_credentials = GetMethodDelegate<Delegates.grpcsharp_call_set_credentials_delegate>(library);
-                this.grpcsharp_call_get_peer = GetMethodDelegate<Delegates.grpcsharp_call_get_peer_delegate>(library);
-                this.grpcsharp_call_destroy = GetMethodDelegate<Delegates.grpcsharp_call_destroy_delegate>(library);
-
-                this.grpcsharp_channel_args_create = GetMethodDelegate<Delegates.grpcsharp_channel_args_create_delegate>(library);
-                this.grpcsharp_channel_args_set_string = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_string_delegate>(library);
-                this.grpcsharp_channel_args_set_integer = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_integer_delegate>(library);
-                this.grpcsharp_channel_args_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_args_destroy_delegate>(library);
-
-                this.grpcsharp_override_default_ssl_roots = GetMethodDelegate<Delegates.grpcsharp_override_default_ssl_roots>(library);
-                this.grpcsharp_ssl_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_credentials_create_delegate>(library);
-                this.grpcsharp_composite_channel_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_channel_credentials_create_delegate>(library);
-                this.grpcsharp_channel_credentials_release = GetMethodDelegate<Delegates.grpcsharp_channel_credentials_release_delegate>(library);
-
-                this.grpcsharp_insecure_channel_create = GetMethodDelegate<Delegates.grpcsharp_insecure_channel_create_delegate>(library);
-                this.grpcsharp_secure_channel_create = GetMethodDelegate<Delegates.grpcsharp_secure_channel_create_delegate>(library);
-                this.grpcsharp_channel_create_call = GetMethodDelegate<Delegates.grpcsharp_channel_create_call_delegate>(library);
-                this.grpcsharp_channel_check_connectivity_state = GetMethodDelegate<Delegates.grpcsharp_channel_check_connectivity_state_delegate>(library);
-                this.grpcsharp_channel_watch_connectivity_state = GetMethodDelegate<Delegates.grpcsharp_channel_watch_connectivity_state_delegate>(library);
-                this.grpcsharp_channel_get_target = GetMethodDelegate<Delegates.grpcsharp_channel_get_target_delegate>(library);
-                this.grpcsharp_channel_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_destroy_delegate>(library);
-
-                this.grpcsharp_sizeof_grpc_event = GetMethodDelegate<Delegates.grpcsharp_sizeof_grpc_event_delegate>(library);
-
-                this.grpcsharp_completion_queue_create = GetMethodDelegate<Delegates.grpcsharp_completion_queue_create_delegate>(library);
-                this.grpcsharp_completion_queue_shutdown = GetMethodDelegate<Delegates.grpcsharp_completion_queue_shutdown_delegate>(library);
-                this.grpcsharp_completion_queue_next = GetMethodDelegate<Delegates.grpcsharp_completion_queue_next_delegate>(library);
-                this.grpcsharp_completion_queue_pluck = GetMethodDelegate<Delegates.grpcsharp_completion_queue_pluck_delegate>(library);
-                this.grpcsharp_completion_queue_destroy = GetMethodDelegate<Delegates.grpcsharp_completion_queue_destroy_delegate>(library);
-
-                this.gprsharp_free = GetMethodDelegate<Delegates.gprsharp_free_delegate>(library);
-
-                this.grpcsharp_metadata_array_create = GetMethodDelegate<Delegates.grpcsharp_metadata_array_create_delegate>(library);
-                this.grpcsharp_metadata_array_add = GetMethodDelegate<Delegates.grpcsharp_metadata_array_add_delegate>(library);
-                this.grpcsharp_metadata_array_count = GetMethodDelegate<Delegates.grpcsharp_metadata_array_count_delegate>(library);
-                this.grpcsharp_metadata_array_get_key = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_key_delegate>(library);
-                this.grpcsharp_metadata_array_get_value = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_value_delegate>(library);
-                this.grpcsharp_metadata_array_get_value_length = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_value_length_delegate>(library);
-                this.grpcsharp_metadata_array_destroy_full = GetMethodDelegate<Delegates.grpcsharp_metadata_array_destroy_full_delegate>(library);
-
-                this.grpcsharp_redirect_log = GetMethodDelegate<Delegates.grpcsharp_redirect_log_delegate>(library);
-
-                this.grpcsharp_metadata_credentials_create_from_plugin = GetMethodDelegate<Delegates.grpcsharp_metadata_credentials_create_from_plugin_delegate>(library);
-                this.grpcsharp_metadata_credentials_notify_from_plugin = GetMethodDelegate<Delegates.grpcsharp_metadata_credentials_notify_from_plugin_delegate>(library);
-
-                this.grpcsharp_ssl_server_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_server_credentials_create_delegate>(library);
-                this.grpcsharp_server_credentials_release = GetMethodDelegate<Delegates.grpcsharp_server_credentials_release_delegate>(library);
-
-                this.grpcsharp_server_create = GetMethodDelegate<Delegates.grpcsharp_server_create_delegate>(library);
-                this.grpcsharp_server_register_completion_queue = GetMethodDelegate<Delegates.grpcsharp_server_register_completion_queue_delegate>(library);
-                this.grpcsharp_server_add_insecure_http2_port = GetMethodDelegate<Delegates.grpcsharp_server_add_insecure_http2_port_delegate>(library);
-                this.grpcsharp_server_add_secure_http2_port = GetMethodDelegate<Delegates.grpcsharp_server_add_secure_http2_port_delegate>(library);
-                this.grpcsharp_server_start = GetMethodDelegate<Delegates.grpcsharp_server_start_delegate>(library);
-                this.grpcsharp_server_request_call = GetMethodDelegate<Delegates.grpcsharp_server_request_call_delegate>(library);
-                this.grpcsharp_server_cancel_all_calls = GetMethodDelegate<Delegates.grpcsharp_server_cancel_all_calls_delegate>(library);
-                this.grpcsharp_server_shutdown_and_notify_callback = GetMethodDelegate<Delegates.grpcsharp_server_shutdown_and_notify_callback_delegate>(library);
-                this.grpcsharp_server_destroy = GetMethodDelegate<Delegates.grpcsharp_server_destroy_delegate>(library);
-
-                this.gprsharp_now = GetMethodDelegate<Delegates.gprsharp_now_delegate>(library);
-                this.gprsharp_inf_future = GetMethodDelegate<Delegates.gprsharp_inf_future_delegate>(library);
-                this.gprsharp_inf_past = GetMethodDelegate<Delegates.gprsharp_inf_past_delegate>(library);
-                this.gprsharp_convert_clock_type = GetMethodDelegate<Delegates.gprsharp_convert_clock_type_delegate>(library);
-                this.gprsharp_sizeof_timespec = GetMethodDelegate<Delegates.gprsharp_sizeof_timespec_delegate>(library);
-
-                this.grpcsharp_test_callback = GetMethodDelegate<Delegates.grpcsharp_test_callback_delegate>(library);
-                this.grpcsharp_test_nop = GetMethodDelegate<Delegates.grpcsharp_test_nop_delegate>(library);
-            }
-            else
-            {
-                // Windows or fallback
-                this.grpcsharp_init = PInvokeMethods.grpcsharp_init;
-                this.grpcsharp_shutdown = PInvokeMethods.grpcsharp_shutdown;
-                this.grpcsharp_version_string = PInvokeMethods.grpcsharp_version_string;
-
-                this.grpcsharp_batch_context_create = PInvokeMethods.grpcsharp_batch_context_create;
-                this.grpcsharp_batch_context_recv_initial_metadata = PInvokeMethods.grpcsharp_batch_context_recv_initial_metadata;
-                this.grpcsharp_batch_context_recv_message_length = PInvokeMethods.grpcsharp_batch_context_recv_message_length;
-                this.grpcsharp_batch_context_recv_message_to_buffer = PInvokeMethods.grpcsharp_batch_context_recv_message_to_buffer;
-                this.grpcsharp_batch_context_recv_status_on_client_status = PInvokeMethods.grpcsharp_batch_context_recv_status_on_client_status;
-                this.grpcsharp_batch_context_recv_status_on_client_details = PInvokeMethods.grpcsharp_batch_context_recv_status_on_client_details;
-                this.grpcsharp_batch_context_recv_status_on_client_trailing_metadata = PInvokeMethods.grpcsharp_batch_context_recv_status_on_client_trailing_metadata;
-                this.grpcsharp_batch_context_server_rpc_new_call = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_call;
-                this.grpcsharp_batch_context_server_rpc_new_method = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_method;
-                this.grpcsharp_batch_context_server_rpc_new_host = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_host;
-                this.grpcsharp_batch_context_server_rpc_new_deadline = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_deadline;
-                this.grpcsharp_batch_context_server_rpc_new_request_metadata = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_request_metadata;
-                this.grpcsharp_batch_context_recv_close_on_server_cancelled = PInvokeMethods.grpcsharp_batch_context_recv_close_on_server_cancelled;
-                this.grpcsharp_batch_context_destroy = PInvokeMethods.grpcsharp_batch_context_destroy;
-
-                this.grpcsharp_composite_call_credentials_create = PInvokeMethods.grpcsharp_composite_call_credentials_create;
-                this.grpcsharp_call_credentials_release = PInvokeMethods.grpcsharp_call_credentials_release;
-
-                this.grpcsharp_call_cancel = PInvokeMethods.grpcsharp_call_cancel;
-                this.grpcsharp_call_cancel_with_status = PInvokeMethods.grpcsharp_call_cancel_with_status;
-                this.grpcsharp_call_start_unary = PInvokeMethods.grpcsharp_call_start_unary;
-                this.grpcsharp_call_start_client_streaming = PInvokeMethods.grpcsharp_call_start_client_streaming;
-                this.grpcsharp_call_start_server_streaming = PInvokeMethods.grpcsharp_call_start_server_streaming;
-                this.grpcsharp_call_start_duplex_streaming = PInvokeMethods.grpcsharp_call_start_duplex_streaming;
-                this.grpcsharp_call_send_message = PInvokeMethods.grpcsharp_call_send_message;
-                this.grpcsharp_call_send_close_from_client = PInvokeMethods.grpcsharp_call_send_close_from_client;
-                this.grpcsharp_call_send_status_from_server = PInvokeMethods.grpcsharp_call_send_status_from_server;
-                this.grpcsharp_call_recv_message = PInvokeMethods.grpcsharp_call_recv_message;
-                this.grpcsharp_call_recv_initial_metadata = PInvokeMethods.grpcsharp_call_recv_initial_metadata;
-                this.grpcsharp_call_start_serverside = PInvokeMethods.grpcsharp_call_start_serverside;
-                this.grpcsharp_call_send_initial_metadata = PInvokeMethods.grpcsharp_call_send_initial_metadata;
-                this.grpcsharp_call_set_credentials = PInvokeMethods.grpcsharp_call_set_credentials;
-                this.grpcsharp_call_get_peer = PInvokeMethods.grpcsharp_call_get_peer;
-                this.grpcsharp_call_destroy = PInvokeMethods.grpcsharp_call_destroy;
-
-                this.grpcsharp_channel_args_create = PInvokeMethods.grpcsharp_channel_args_create;
-                this.grpcsharp_channel_args_set_string = PInvokeMethods.grpcsharp_channel_args_set_string;
-                this.grpcsharp_channel_args_set_integer = PInvokeMethods.grpcsharp_channel_args_set_integer;
-                this.grpcsharp_channel_args_destroy = PInvokeMethods.grpcsharp_channel_args_destroy;
-
-                this.grpcsharp_override_default_ssl_roots = PInvokeMethods.grpcsharp_override_default_ssl_roots;
-                this.grpcsharp_ssl_credentials_create = PInvokeMethods.grpcsharp_ssl_credentials_create;
-                this.grpcsharp_composite_channel_credentials_create = PInvokeMethods.grpcsharp_composite_channel_credentials_create;
-                this.grpcsharp_channel_credentials_release = PInvokeMethods.grpcsharp_channel_credentials_release;
-
-                this.grpcsharp_insecure_channel_create = PInvokeMethods.grpcsharp_insecure_channel_create;
-                this.grpcsharp_secure_channel_create = PInvokeMethods.grpcsharp_secure_channel_create;
-                this.grpcsharp_channel_create_call = PInvokeMethods.grpcsharp_channel_create_call;
-                this.grpcsharp_channel_check_connectivity_state = PInvokeMethods.grpcsharp_channel_check_connectivity_state;
-                this.grpcsharp_channel_watch_connectivity_state = PInvokeMethods.grpcsharp_channel_watch_connectivity_state;
-                this.grpcsharp_channel_get_target = PInvokeMethods.grpcsharp_channel_get_target;
-                this.grpcsharp_channel_destroy = PInvokeMethods.grpcsharp_channel_destroy;
-
-                this.grpcsharp_sizeof_grpc_event = PInvokeMethods.grpcsharp_sizeof_grpc_event;
-
-                this.grpcsharp_completion_queue_create = PInvokeMethods.grpcsharp_completion_queue_create;
-                this.grpcsharp_completion_queue_shutdown = PInvokeMethods.grpcsharp_completion_queue_shutdown;
-                this.grpcsharp_completion_queue_next = PInvokeMethods.grpcsharp_completion_queue_next;
-                this.grpcsharp_completion_queue_pluck = PInvokeMethods.grpcsharp_completion_queue_pluck;
-                this.grpcsharp_completion_queue_destroy = PInvokeMethods.grpcsharp_completion_queue_destroy;
-
-                this.gprsharp_free = PInvokeMethods.gprsharp_free;
-
-                this.grpcsharp_metadata_array_create = PInvokeMethods.grpcsharp_metadata_array_create;
-                this.grpcsharp_metadata_array_add = PInvokeMethods.grpcsharp_metadata_array_add;
-                this.grpcsharp_metadata_array_count = PInvokeMethods.grpcsharp_metadata_array_count;
-                this.grpcsharp_metadata_array_get_key = PInvokeMethods.grpcsharp_metadata_array_get_key;
-                this.grpcsharp_metadata_array_get_value = PInvokeMethods.grpcsharp_metadata_array_get_value;
-                this.grpcsharp_metadata_array_get_value_length = PInvokeMethods.grpcsharp_metadata_array_get_value_length;
-                this.grpcsharp_metadata_array_destroy_full = PInvokeMethods.grpcsharp_metadata_array_destroy_full;
-
-                this.grpcsharp_redirect_log = PInvokeMethods.grpcsharp_redirect_log;
-
-                this.grpcsharp_metadata_credentials_create_from_plugin = PInvokeMethods.grpcsharp_metadata_credentials_create_from_plugin;
-                this.grpcsharp_metadata_credentials_notify_from_plugin = PInvokeMethods.grpcsharp_metadata_credentials_notify_from_plugin;
-
-                this.grpcsharp_ssl_server_credentials_create = PInvokeMethods.grpcsharp_ssl_server_credentials_create;
-                this.grpcsharp_server_credentials_release = PInvokeMethods.grpcsharp_server_credentials_release;
-
-                this.grpcsharp_server_create = PInvokeMethods.grpcsharp_server_create;
-                this.grpcsharp_server_register_completion_queue = PInvokeMethods.grpcsharp_server_register_completion_queue;
-                this.grpcsharp_server_add_insecure_http2_port = PInvokeMethods.grpcsharp_server_add_insecure_http2_port;
-                this.grpcsharp_server_add_secure_http2_port = PInvokeMethods.grpcsharp_server_add_secure_http2_port;
-                this.grpcsharp_server_start = PInvokeMethods.grpcsharp_server_start;
-                this.grpcsharp_server_request_call = PInvokeMethods.grpcsharp_server_request_call;
-                this.grpcsharp_server_cancel_all_calls = PInvokeMethods.grpcsharp_server_cancel_all_calls;
-                this.grpcsharp_server_shutdown_and_notify_callback = PInvokeMethods.grpcsharp_server_shutdown_and_notify_callback;
-                this.grpcsharp_server_destroy = PInvokeMethods.grpcsharp_server_destroy;
-
-                this.gprsharp_now = PInvokeMethods.gprsharp_now;
-                this.gprsharp_inf_future = PInvokeMethods.gprsharp_inf_future;
-                this.gprsharp_inf_past = PInvokeMethods.gprsharp_inf_past;
-                this.gprsharp_convert_clock_type = PInvokeMethods.gprsharp_convert_clock_type;
-                this.gprsharp_sizeof_timespec = PInvokeMethods.gprsharp_sizeof_timespec;
-
-                this.grpcsharp_test_callback = PInvokeMethods.grpcsharp_test_callback;
-                this.grpcsharp_test_nop = PInvokeMethods.grpcsharp_test_nop;
-            }
+            this.grpcsharp_init = GetMethodDelegate<Delegates.grpcsharp_init_delegate>(library);
+            this.grpcsharp_shutdown = GetMethodDelegate<Delegates.grpcsharp_shutdown_delegate>(library);
+            this.grpcsharp_version_string = GetMethodDelegate<Delegates.grpcsharp_version_string_delegate>(library);
+
+            this.grpcsharp_batch_context_create = GetMethodDelegate<Delegates.grpcsharp_batch_context_create_delegate>(library);
+            this.grpcsharp_batch_context_recv_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_initial_metadata_delegate>(library);
+            this.grpcsharp_batch_context_recv_message_length = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_message_length_delegate>(library);
+            this.grpcsharp_batch_context_recv_message_to_buffer = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_message_to_buffer_delegate>(library);
+            this.grpcsharp_batch_context_recv_status_on_client_status = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_status_delegate>(library);
+            this.grpcsharp_batch_context_recv_status_on_client_details = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_details_delegate>(library);
+            this.grpcsharp_batch_context_recv_status_on_client_trailing_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_trailing_metadata_delegate>(library);
+            this.grpcsharp_batch_context_server_rpc_new_call = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_call_delegate>(library);
+            this.grpcsharp_batch_context_server_rpc_new_method = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_method_delegate>(library);
+            this.grpcsharp_batch_context_server_rpc_new_host = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_host_delegate>(library);
+            this.grpcsharp_batch_context_server_rpc_new_deadline = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_deadline_delegate>(library);
+            this.grpcsharp_batch_context_server_rpc_new_request_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_request_metadata_delegate>(library);
+            this.grpcsharp_batch_context_recv_close_on_server_cancelled = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_close_on_server_cancelled_delegate>(library);
+            this.grpcsharp_batch_context_destroy = GetMethodDelegate<Delegates.grpcsharp_batch_context_destroy_delegate>(library);
+
+            this.grpcsharp_composite_call_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_call_credentials_create_delegate>(library);
+            this.grpcsharp_call_credentials_release = GetMethodDelegate<Delegates.grpcsharp_call_credentials_release_delegate>(library);
+
+            this.grpcsharp_call_cancel = GetMethodDelegate<Delegates.grpcsharp_call_cancel_delegate>(library);
+            this.grpcsharp_call_cancel_with_status = GetMethodDelegate<Delegates.grpcsharp_call_cancel_with_status_delegate>(library);
+            this.grpcsharp_call_start_unary = GetMethodDelegate<Delegates.grpcsharp_call_start_unary_delegate>(library);
+            this.grpcsharp_call_start_client_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_client_streaming_delegate>(library);
+            this.grpcsharp_call_start_server_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_server_streaming_delegate>(library);
+            this.grpcsharp_call_start_duplex_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_duplex_streaming_delegate>(library);
+            this.grpcsharp_call_send_message = GetMethodDelegate<Delegates.grpcsharp_call_send_message_delegate>(library);
+            this.grpcsharp_call_send_close_from_client = GetMethodDelegate<Delegates.grpcsharp_call_send_close_from_client_delegate>(library);
+            this.grpcsharp_call_send_status_from_server = GetMethodDelegate<Delegates.grpcsharp_call_send_status_from_server_delegate>(library);
+            this.grpcsharp_call_recv_message = GetMethodDelegate<Delegates.grpcsharp_call_recv_message_delegate>(library);
+            this.grpcsharp_call_recv_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_call_recv_initial_metadata_delegate>(library);
+            this.grpcsharp_call_start_serverside = GetMethodDelegate<Delegates.grpcsharp_call_start_serverside_delegate>(library);
+            this.grpcsharp_call_send_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_call_send_initial_metadata_delegate>(library);
+            this.grpcsharp_call_set_credentials = GetMethodDelegate<Delegates.grpcsharp_call_set_credentials_delegate>(library);
+            this.grpcsharp_call_get_peer = GetMethodDelegate<Delegates.grpcsharp_call_get_peer_delegate>(library);
+            this.grpcsharp_call_destroy = GetMethodDelegate<Delegates.grpcsharp_call_destroy_delegate>(library);
+
+            this.grpcsharp_channel_args_create = GetMethodDelegate<Delegates.grpcsharp_channel_args_create_delegate>(library);
+            this.grpcsharp_channel_args_set_string = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_string_delegate>(library);
+            this.grpcsharp_channel_args_set_integer = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_integer_delegate>(library);
+            this.grpcsharp_channel_args_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_args_destroy_delegate>(library);
+
+            this.grpcsharp_override_default_ssl_roots = GetMethodDelegate<Delegates.grpcsharp_override_default_ssl_roots>(library);
+            this.grpcsharp_ssl_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_credentials_create_delegate>(library);
+            this.grpcsharp_composite_channel_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_channel_credentials_create_delegate>(library);
+            this.grpcsharp_channel_credentials_release = GetMethodDelegate<Delegates.grpcsharp_channel_credentials_release_delegate>(library);
+
+            this.grpcsharp_insecure_channel_create = GetMethodDelegate<Delegates.grpcsharp_insecure_channel_create_delegate>(library);
+            this.grpcsharp_secure_channel_create = GetMethodDelegate<Delegates.grpcsharp_secure_channel_create_delegate>(library);
+            this.grpcsharp_channel_create_call = GetMethodDelegate<Delegates.grpcsharp_channel_create_call_delegate>(library);
+            this.grpcsharp_channel_check_connectivity_state = GetMethodDelegate<Delegates.grpcsharp_channel_check_connectivity_state_delegate>(library);
+            this.grpcsharp_channel_watch_connectivity_state = GetMethodDelegate<Delegates.grpcsharp_channel_watch_connectivity_state_delegate>(library);
+            this.grpcsharp_channel_get_target = GetMethodDelegate<Delegates.grpcsharp_channel_get_target_delegate>(library);
+            this.grpcsharp_channel_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_destroy_delegate>(library);
+
+            this.grpcsharp_sizeof_grpc_event = GetMethodDelegate<Delegates.grpcsharp_sizeof_grpc_event_delegate>(library);
+
+            this.grpcsharp_completion_queue_create = GetMethodDelegate<Delegates.grpcsharp_completion_queue_create_delegate>(library);
+            this.grpcsharp_completion_queue_shutdown = GetMethodDelegate<Delegates.grpcsharp_completion_queue_shutdown_delegate>(library);
+            this.grpcsharp_completion_queue_next = GetMethodDelegate<Delegates.grpcsharp_completion_queue_next_delegate>(library);
+            this.grpcsharp_completion_queue_pluck = GetMethodDelegate<Delegates.grpcsharp_completion_queue_pluck_delegate>(library);
+            this.grpcsharp_completion_queue_destroy = GetMethodDelegate<Delegates.grpcsharp_completion_queue_destroy_delegate>(library);
+
+            this.gprsharp_free = GetMethodDelegate<Delegates.gprsharp_free_delegate>(library);
+
+            this.grpcsharp_metadata_array_create = GetMethodDelegate<Delegates.grpcsharp_metadata_array_create_delegate>(library);
+            this.grpcsharp_metadata_array_add = GetMethodDelegate<Delegates.grpcsharp_metadata_array_add_delegate>(library);
+            this.grpcsharp_metadata_array_count = GetMethodDelegate<Delegates.grpcsharp_metadata_array_count_delegate>(library);
+            this.grpcsharp_metadata_array_get_key = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_key_delegate>(library);
+            this.grpcsharp_metadata_array_get_value = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_value_delegate>(library);
+            this.grpcsharp_metadata_array_get_value_length = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_value_length_delegate>(library);
+            this.grpcsharp_metadata_array_destroy_full = GetMethodDelegate<Delegates.grpcsharp_metadata_array_destroy_full_delegate>(library);
+
+            this.grpcsharp_redirect_log = GetMethodDelegate<Delegates.grpcsharp_redirect_log_delegate>(library);
+
+            this.grpcsharp_metadata_credentials_create_from_plugin = GetMethodDelegate<Delegates.grpcsharp_metadata_credentials_create_from_plugin_delegate>(library);
+            this.grpcsharp_metadata_credentials_notify_from_plugin = GetMethodDelegate<Delegates.grpcsharp_metadata_credentials_notify_from_plugin_delegate>(library);
+
+            this.grpcsharp_ssl_server_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_server_credentials_create_delegate>(library);
+            this.grpcsharp_server_credentials_release = GetMethodDelegate<Delegates.grpcsharp_server_credentials_release_delegate>(library);
+
+            this.grpcsharp_server_create = GetMethodDelegate<Delegates.grpcsharp_server_create_delegate>(library);
+            this.grpcsharp_server_register_completion_queue = GetMethodDelegate<Delegates.grpcsharp_server_register_completion_queue_delegate>(library);
+            this.grpcsharp_server_add_insecure_http2_port = GetMethodDelegate<Delegates.grpcsharp_server_add_insecure_http2_port_delegate>(library);
+            this.grpcsharp_server_add_secure_http2_port = GetMethodDelegate<Delegates.grpcsharp_server_add_secure_http2_port_delegate>(library);
+            this.grpcsharp_server_start = GetMethodDelegate<Delegates.grpcsharp_server_start_delegate>(library);
+            this.grpcsharp_server_request_call = GetMethodDelegate<Delegates.grpcsharp_server_request_call_delegate>(library);
+            this.grpcsharp_server_cancel_all_calls = GetMethodDelegate<Delegates.grpcsharp_server_cancel_all_calls_delegate>(library);
+            this.grpcsharp_server_shutdown_and_notify_callback = GetMethodDelegate<Delegates.grpcsharp_server_shutdown_and_notify_callback_delegate>(library);
+            this.grpcsharp_server_destroy = GetMethodDelegate<Delegates.grpcsharp_server_destroy_delegate>(library);
+
+            this.gprsharp_now = GetMethodDelegate<Delegates.gprsharp_now_delegate>(library);
+            this.gprsharp_inf_future = GetMethodDelegate<Delegates.gprsharp_inf_future_delegate>(library);
+            this.gprsharp_inf_past = GetMethodDelegate<Delegates.gprsharp_inf_past_delegate>(library);
+            this.gprsharp_convert_clock_type = GetMethodDelegate<Delegates.gprsharp_convert_clock_type_delegate>(library);
+            this.gprsharp_sizeof_timespec = GetMethodDelegate<Delegates.gprsharp_sizeof_timespec_delegate>(library);
+
+            this.grpcsharp_test_callback = GetMethodDelegate<Delegates.grpcsharp_test_callback_delegate>(library);
+            this.grpcsharp_test_nop = GetMethodDelegate<Delegates.grpcsharp_test_nop_delegate>(library);
         }
 
         /// <summary>
@@ -516,317 +408,5 @@ namespace Grpc.Core.Internal
             public delegate CallError grpcsharp_test_callback_delegate([MarshalAs(UnmanagedType.FunctionPtr)] OpCompletionDelegate callback);
             public delegate IntPtr grpcsharp_test_nop_delegate(IntPtr ptr);
         }
-
-        /// <summary>
-        /// Default PInvoke bindings for native methods that are used on Windows.
-        /// Alternatively, they can also be used as a fallback on Mono
-        /// (if libgrpc_csharp_ext is installed on your system, or is made accessible through e.g. LD_LIBRARY_PATH environment variable
-        /// or using Mono's dllMap feature).
-        /// </summary>
-        private class PInvokeMethods
-        {
-            // Environment
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_init();
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_shutdown();
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_version_string();  // returns not-owned const char*
-
-            // BatchContextSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern BatchContextSafeHandle grpcsharp_batch_context_create();
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_recv_initial_metadata(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_recv_message_length(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_batch_context_recv_message_to_buffer(BatchContextSafeHandle ctx, byte[] buffer, UIntPtr bufferLen);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern StatusCode grpcsharp_batch_context_recv_status_on_client_status(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_recv_status_on_client_details(BatchContextSafeHandle ctx);  // returns const char*
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_recv_status_on_client_trailing_metadata(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallSafeHandle grpcsharp_batch_context_server_rpc_new_call(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_server_rpc_new_method(BatchContextSafeHandle ctx);  // returns const char*
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_server_rpc_new_host(BatchContextSafeHandle ctx);  // returns const char*
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern Timespec grpcsharp_batch_context_server_rpc_new_deadline(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_batch_context_server_rpc_new_request_metadata(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern int grpcsharp_batch_context_recv_close_on_server_cancelled(BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_batch_context_destroy(IntPtr ctx);
-
-            // CallCredentialsSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallCredentialsSafeHandle grpcsharp_composite_call_credentials_create(CallCredentialsSafeHandle creds1, CallCredentialsSafeHandle creds2);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_call_credentials_release(IntPtr credentials);
-
-            // CallSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_cancel(CallSafeHandle call);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_cancel_with_status(CallSafeHandle call, StatusCode status, string description);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_start_unary(CallSafeHandle call,
-                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_start_client_streaming(CallSafeHandle call,
-                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_start_server_streaming(CallSafeHandle call,
-                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen,
-                MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_start_duplex_streaming(CallSafeHandle call,
-                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_send_message(CallSafeHandle call,
-                BatchContextSafeHandle ctx, byte[] sendBuffer, UIntPtr sendBufferLen, WriteFlags writeFlags, bool sendEmptyInitialMetadata);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_send_close_from_client(CallSafeHandle call,
-                BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_send_status_from_server(CallSafeHandle call,
-                BatchContextSafeHandle ctx, StatusCode statusCode, string statusMessage, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata,
-                byte[] optionalSendBuffer, UIntPtr optionalSendBufferLen, WriteFlags writeFlags);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_recv_message(CallSafeHandle call,
-                BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_recv_initial_metadata(CallSafeHandle call,
-                BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_start_serverside(CallSafeHandle call,
-                BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_send_initial_metadata(CallSafeHandle call,
-                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_call_set_credentials(CallSafeHandle call, CallCredentialsSafeHandle credentials);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CStringSafeHandle grpcsharp_call_get_peer(CallSafeHandle call);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_call_destroy(IntPtr call);
-
-            // ChannelArgsSafeHandle 
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern ChannelArgsSafeHandle grpcsharp_channel_args_create(UIntPtr numArgs);
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern void grpcsharp_channel_args_set_string(ChannelArgsSafeHandle args, UIntPtr index, string key, string value);
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern void grpcsharp_channel_args_set_integer(ChannelArgsSafeHandle args, UIntPtr index, string key, int value);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_channel_args_destroy(IntPtr args);
-
-            // ChannelCredentialsSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern void grpcsharp_override_default_ssl_roots(string pemRootCerts);
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern ChannelCredentialsSafeHandle grpcsharp_composite_channel_credentials_create(ChannelCredentialsSafeHandle channelCreds, CallCredentialsSafeHandle callCreds);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_channel_credentials_release(IntPtr credentials);
-
-            // ChannelSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern ChannelSafeHandle grpcsharp_insecure_channel_create(string target, ChannelArgsSafeHandle channelArgs);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern ChannelSafeHandle grpcsharp_secure_channel_create(ChannelCredentialsSafeHandle credentials, string target, ChannelArgsSafeHandle channelArgs);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallSafeHandle grpcsharp_channel_create_call(ChannelSafeHandle channel, CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern ChannelState grpcsharp_channel_check_connectivity_state(ChannelSafeHandle channel, int tryToConnect);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_channel_watch_connectivity_state(ChannelSafeHandle channel, ChannelState lastObservedState,
-                Timespec deadline, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CStringSafeHandle grpcsharp_channel_get_target(ChannelSafeHandle call);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_channel_destroy(IntPtr channel);
-
-            // CompletionQueueEvent
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern int grpcsharp_sizeof_grpc_event();
-
-            // CompletionQueueSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CompletionQueueSafeHandle grpcsharp_completion_queue_create();
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_completion_queue_shutdown(CompletionQueueSafeHandle cq);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CompletionQueueEvent grpcsharp_completion_queue_next(CompletionQueueSafeHandle cq);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CompletionQueueEvent grpcsharp_completion_queue_pluck(CompletionQueueSafeHandle cq, IntPtr tag);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_completion_queue_destroy(IntPtr cq);
-
-            // CStringSafeHandle 
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void gprsharp_free(IntPtr ptr);
-
-            // MetadataArraySafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern MetadataArraySafeHandle grpcsharp_metadata_array_create(UIntPtr capacity);
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern void grpcsharp_metadata_array_add(MetadataArraySafeHandle array, string key, byte[] value, UIntPtr valueLength);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern UIntPtr grpcsharp_metadata_array_count(IntPtr metadataArray);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_metadata_array_get_key(IntPtr metadataArray, UIntPtr index);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_metadata_array_get_value(IntPtr metadataArray, UIntPtr index);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern UIntPtr grpcsharp_metadata_array_get_value_length(IntPtr metadataArray, UIntPtr index);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_metadata_array_destroy_full(IntPtr array);
-
-            // NativeLogRedirector
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_redirect_log(GprLogDelegate callback);
-
-            // NativeMetadataCredentialsPlugin
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallCredentialsSafeHandle grpcsharp_metadata_credentials_create_from_plugin(NativeMetadataInterceptor interceptor);
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern void grpcsharp_metadata_credentials_notify_from_plugin(IntPtr callbackPtr, IntPtr userData, MetadataArraySafeHandle metadataArray, StatusCode statusCode, string errorDetails);
-
-            // ServerCredentialsSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
-            public static extern ServerCredentialsSafeHandle grpcsharp_ssl_server_credentials_create(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, UIntPtr numKeyCertPairs, bool forceClientAuth);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_server_credentials_release(IntPtr credentials);
-
-            // ServerSafeHandle
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern ServerSafeHandle grpcsharp_server_create(ChannelArgsSafeHandle args);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_server_register_completion_queue(ServerSafeHandle server, CompletionQueueSafeHandle cq);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern int grpcsharp_server_add_insecure_http2_port(ServerSafeHandle server, string addr);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern int grpcsharp_server_add_secure_http2_port(ServerSafeHandle server, string addr, ServerCredentialsSafeHandle creds);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_server_start(ServerSafeHandle server);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_server_request_call(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_server_cancel_all_calls(ServerSafeHandle server);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_server_shutdown_and_notify_callback(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern void grpcsharp_server_destroy(IntPtr server);
-
-            // Timespec
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern Timespec gprsharp_now(ClockType clockType);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern Timespec gprsharp_inf_future(ClockType clockType);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern Timespec gprsharp_inf_past(ClockType clockType);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern Timespec gprsharp_convert_clock_type(Timespec t, ClockType targetClock);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern int gprsharp_sizeof_timespec();
-
-            // Testing
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern CallError grpcsharp_test_callback([MarshalAs(UnmanagedType.FunctionPtr)] OpCompletionDelegate callback);
-
-            [DllImport("grpc_csharp_ext.dll")]
-            public static extern IntPtr grpcsharp_test_nop(IntPtr ptr);
-        }
     }
 }
diff --git a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
index 5a80746101..dc629bd714 100644
--- a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
+++ b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
@@ -82,6 +82,32 @@ namespace Grpc.Core.Internal
         /// <returns></returns>
         public IntPtr LoadSymbol(string symbolName)
         {
+            if (PlatformApis.IsWindows)
+            {
+                // See http://stackoverflow.com/questions/10473310 for background on this.
+                if (PlatformApis.Is64Bit)
+                {
+                    return Windows.GetProcAddress(this.handle, symbolName);
+                }
+                else
+                {
+                    // Yes, we could potentially predict the size... but it's a lot simpler to just try
+                    // all the candidates. Most functions have a suffix of @0, @4 or @8 so we won't be trying
+                    // many options - and if it takes a little bit longer to fail if we've really got the wrong
+                    // library, that's not a big problem. This is only called once per function in the native library.
+                    symbolName = "_" + symbolName + "@";
+                    for (int stackSize = 0; stackSize < 128; stackSize += 4)
+                    {
+                        IntPtr candidate = Windows.GetProcAddress(this.handle, symbolName + stackSize);
+                        if (candidate != IntPtr.Zero)
+                        {
+                            return candidate;
+                        }
+                    }
+                    // Fail.
+                    return IntPtr.Zero;
+                }
+            }
             if (PlatformApis.IsLinux)
             {
                 if (PlatformApis.IsMono)
@@ -142,13 +168,18 @@ namespace Grpc.Core.Internal
                     return path;
                 }
             }
-            throw new FileNotFoundException(String.Format("Error loading native library. Not found in any of the possible locations {0}", libraryPathAlternatives));
+            throw new FileNotFoundException(
+                String.Format("Error loading native library. Not found in any of the possible locations: {0}", 
+                    string.Join(",", libraryPathAlternatives)));
         }
 
         private static class Windows
         {
             [DllImport("kernel32.dll")]
             internal static extern IntPtr LoadLibrary(string filename);
+
+            [DllImport("kernel32.dll")]
+            internal static extern IntPtr GetProcAddress(IntPtr hModule, string procName);
         }
 
         private static class Linux
diff --git a/src/csharp/Grpc.Core/NativeDeps.Linux.targets b/src/csharp/Grpc.Core/NativeDeps.Linux.targets
index a3848c6f2e..e0c9132b1d 100644
--- a/src/csharp/Grpc.Core/NativeDeps.Linux.targets
+++ b/src/csharp/Grpc.Core/NativeDeps.Linux.targets
@@ -3,7 +3,7 @@
   <ItemGroup>
     <Content Include="..\..\..\libs\$(NativeDependenciesConfigurationUnix)\libgrpc_csharp_ext.so">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\linux_x64\libgrpc_csharp_ext.so</Link>
+      <Link>libgrpc_csharp_ext.x64.so</Link>
     </Content>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/NativeDeps.Mac.targets b/src/csharp/Grpc.Core/NativeDeps.Mac.targets
index c3c6264fd3..e22c7384fc 100644
--- a/src/csharp/Grpc.Core/NativeDeps.Mac.targets
+++ b/src/csharp/Grpc.Core/NativeDeps.Mac.targets
@@ -3,7 +3,7 @@
   <ItemGroup>
     <Content Include="..\..\..\libs\$(NativeDependenciesConfigurationUnix)\libgrpc_csharp_ext.dylib">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\macosx_x86\libgrpc_csharp_ext.dylib</Link>
+      <Link>libgrpc_csharp_ext.x86.dylib</Link>
     </Content>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/NativeDeps.Windows.targets b/src/csharp/Grpc.Core/NativeDeps.Windows.targets
index f6a3405e29..93db0935bc 100644
--- a/src/csharp/Grpc.Core/NativeDeps.Windows.targets
+++ b/src/csharp/Grpc.Core/NativeDeps.Windows.targets
@@ -3,7 +3,7 @@
   <ItemGroup>
     <Content Include="..\..\..\vsprojects\$(NativeDependenciesConfiguration)\grpc_csharp_ext.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Link>nativelibs\windows_x86\grpc_csharp_ext.dll</Link>
+      <Link>grpc_csharp_ext.x86.dll</Link>
     </Content>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 4545d26aa5..807508896a 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -14,12 +14,12 @@
     "files": {
       "mappings": {
         "build/net45/": "Grpc.Core.targets",
-        "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
-        "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
-        "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
-        "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
-        "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
-        "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+        "runtimes/win/native/grpc_csharp_ext.x86.dll": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
+        "runtimes/win/native/grpc_csharp_ext.x64.dll": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
+        "runtimes/linux/native/libgrpc_csharp_ext.x86.so": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
+        "runtimes/linux/native/libgrpc_csharp_ext.x64.so": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
+        "runtimes/osx/native/libgrpc_csharp_ext.x86.dylib": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
+        "runtimes/osx/native/libgrpc_csharp_ext.x64.dylib": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
       }
     }
   },
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index b865cd5011..206d6c5982 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -14,10 +14,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -33,10 +33,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index b865cd5011..206d6c5982 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -14,10 +14,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -33,10 +33,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index cc518eb6ff..b4c4c5f691 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -14,10 +14,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -33,10 +33,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index fbf8d92f04..f44a3225ae 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -14,10 +14,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -33,10 +33,10 @@
         },
         "copyToOutput": {
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index 4a2846feea..6b61a4b76e 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -15,10 +15,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -35,10 +35,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index 4a2846feea..6b61a4b76e 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -15,10 +15,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -35,10 +35,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index 4a2846feea..6b61a4b76e 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -15,10 +15,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -35,10 +35,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index 4a2846feea..6b61a4b76e 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -15,10 +15,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -35,10 +35,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 6297600ddc..dcd9ccabd2 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -15,10 +15,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
           }
         }
       }
@@ -35,10 +35,10 @@
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
-            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
-            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
-            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
-            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+            "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "libgrpc_csharp_ext.x64.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
           }
         }
       }
diff --git a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
index 72cadb9319..97f4f586b7 100644
--- a/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
+++ b/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec
@@ -36,7 +36,7 @@ Pod::Spec.new do |s|
   # exclamation mark ensures that other "regular" pods will be able to find it as it'll be installed
   # before them.
   s.name     = '!ProtoCompiler-gRPCPlugin'
-  v = '0.14.0'
+  v = '1.0.0-pre1'
   s.version  = v
   s.summary  = 'The gRPC ProtoC plugin generates Objective-C files from .proto services.'
   s.description = <<-DESC
@@ -82,7 +82,7 @@ Pod::Spec.new do |s|
   s.authors  = { 'The gRPC contributors' => 'grpc-packages@google.com' }
 
   repo = 'grpc/grpc'
-  release = 'release-0_14_1'
+  release = "objective-c-v#{v}"
   file = "grpc_objective_c_plugin-#{v}-macos-x86_64.zip"
   s.source = {
     :http => "https://github.com/#{repo}/releases/download/#{release}/#{file}",
diff --git a/src/objective-c/!ProtoCompiler.podspec b/src/objective-c/!ProtoCompiler.podspec
index 5e59b25aee..56aacc3330 100644
--- a/src/objective-c/!ProtoCompiler.podspec
+++ b/src/objective-c/!ProtoCompiler.podspec
@@ -97,10 +97,9 @@ Pod::Spec.new do |s|
   s.authors  = { 'The Protocol Buffers contributors' => 'protobuf@googlegroups.com' }
 
   repo = 'google/protobuf'
-  release = "v#{v}"
   file = "protoc-#{v}-osx-x86_64.zip"
   s.source = {
-    :http => "https://github.com/#{repo}/releases/download/#{release}/#{file}",
+    :http => "https://github.com/#{repo}/releases/download/v#{v}/#{file}",
     # TODO(jcanizales): Add sha1 or sha256
     # :sha1 => '??',
   }
diff --git a/src/objective-c/BoringSSL.podspec b/src/objective-c/BoringSSL.podspec
index 42b4434d0d..b759997c11 100644
--- a/src/objective-c/BoringSSL.podspec
+++ b/src/objective-c/BoringSSL.podspec
@@ -31,7 +31,7 @@
 
 Pod::Spec.new do |s|
   s.name     = 'BoringSSL'
-  version = '4.0'
+  version = '5.0'
   s.version  = version
   s.summary  = 'BoringSSL is a fork of OpenSSL that is designed to meet Google’s needs.'
   # Adapted from the homepage:
@@ -67,8 +67,11 @@ Pod::Spec.new do |s|
   # "The name and email addresses of the library maintainers, not the Podspec maintainer."
   s.authors  = 'Adam Langley', 'David Benjamin', 'Matt Braithwaite'
 
-  s.source = { :git => 'https://boringssl.googlesource.com/boringssl',
-               :tag => "version_for_cocoapods_#{version}" }
+  s.source = {
+    :git => 'https://boringssl.googlesource.com/boringssl',
+    :tag => "version_for_cocoapods_#{version}",
+    # :commit => '8d343b44bbab829d1a28fdef650ca95f7db4412e',
+  }
 
   name = 'openssl'
 
@@ -219,7 +222,7 @@ Pod::Spec.new do |s|
        * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
        * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
 
-      /* This file was generated by err_data_generate.go. */
+       /* This file was generated by err_data_generate.go. */
 
       #include <openssl/base.h>
       #include <openssl/err.h>
@@ -385,42 +388,42 @@ Pod::Spec.new do |s|
           0x28340c19,
           0x283480ac,
           0x283500ea,
-          0x2c322775,
-          0x2c32a783,
-          0x2c332795,
-          0x2c33a7a7,
-          0x2c3427bb,
-          0x2c34a7cd,
-          0x2c3527e8,
-          0x2c35a7fa,
-          0x2c36280d,
+          0x2c3227cb,
+          0x2c32a7d9,
+          0x2c3327eb,
+          0x2c33a7fd,
+          0x2c342811,
+          0x2c34a823,
+          0x2c35283e,
+          0x2c35a850,
+          0x2c362863,
           0x2c36832d,
-          0x2c37281a,
-          0x2c37a82c,
-          0x2c38283f,
-          0x2c38a856,
-          0x2c392864,
-          0x2c39a874,
-          0x2c3a2886,
-          0x2c3aa89a,
-          0x2c3b28ab,
-          0x2c3ba8ca,
-          0x2c3c28de,
-          0x2c3ca8f4,
-          0x2c3d290d,
-          0x2c3da92a,
-          0x2c3e293b,
-          0x2c3ea949,
-          0x2c3f2961,
-          0x2c3fa979,
-          0x2c402986,
+          0x2c372870,
+          0x2c37a882,
+          0x2c382895,
+          0x2c38a8ac,
+          0x2c3928ba,
+          0x2c39a8ca,
+          0x2c3a28dc,
+          0x2c3aa8f0,
+          0x2c3b2901,
+          0x2c3ba920,
+          0x2c3c2934,
+          0x2c3ca94a,
+          0x2c3d2963,
+          0x2c3da980,
+          0x2c3e2991,
+          0x2c3ea99f,
+          0x2c3f29b7,
+          0x2c3fa9cf,
+          0x2c4029dc,
           0x2c4090e7,
-          0x2c412997,
-          0x2c41a9aa,
+          0x2c4129ed,
+          0x2c41aa00,
           0x2c4210c0,
-          0x2c42a9bb,
+          0x2c42aa11,
           0x2c430720,
-          0x2c43a8bc,
+          0x2c43a912,
           0x30320000,
           0x30328015,
           0x3033001f,
@@ -594,145 +597,148 @@ Pod::Spec.new do |s|
           0x404619e8,
           0x40469a08,
           0x40471a16,
-          0x40479a2a,
-          0x40481a3f,
-          0x40489a58,
-          0x40491a6f,
-          0x40499a89,
-          0x404a1aa0,
-          0x404a9abe,
-          0x404b1ad6,
-          0x404b9aed,
-          0x404c1b03,
-          0x404c9b15,
-          0x404d1b36,
-          0x404d9b58,
-          0x404e1b6c,
-          0x404e9b79,
-          0x404f1b90,
-          0x404f9ba0,
-          0x40501bca,
-          0x40509bde,
-          0x40511bf9,
-          0x40519c09,
-          0x40521c20,
-          0x40529c32,
-          0x40531c4a,
-          0x40539c5d,
-          0x40541c72,
-          0x40549c95,
-          0x40551ca3,
-          0x40559cc0,
-          0x40561ccd,
-          0x40569ce6,
-          0x40571cfe,
-          0x40579d11,
-          0x40581d26,
-          0x40589d38,
-          0x40591d48,
-          0x40599d61,
-          0x405a1d75,
-          0x405a9d85,
-          0x405b1d9d,
-          0x405b9dae,
-          0x405c1dc1,
-          0x405c9dd2,
-          0x405d1ddf,
-          0x405d9df6,
-          0x405e1e16,
+          0x40479a3d,
+          0x40481a52,
+          0x40489a6b,
+          0x40491a82,
+          0x40499a9c,
+          0x404a1ab3,
+          0x404a9ad1,
+          0x404b1ae9,
+          0x404b9b00,
+          0x404c1b16,
+          0x404c9b28,
+          0x404d1b49,
+          0x404d9b6b,
+          0x404e1b7f,
+          0x404e9b8c,
+          0x404f1ba3,
+          0x404f9bb3,
+          0x40501bdd,
+          0x40509bf1,
+          0x40511c0c,
+          0x40519c1c,
+          0x40521c33,
+          0x40529c45,
+          0x40531c5d,
+          0x40539c70,
+          0x40541c85,
+          0x40549ca8,
+          0x40551cb6,
+          0x40559cd3,
+          0x40561ce0,
+          0x40569cf9,
+          0x40571d11,
+          0x40579d24,
+          0x40581d39,
+          0x40589d4b,
+          0x40591d7a,
+          0x40599d93,
+          0x405a1da7,
+          0x405a9db7,
+          0x405b1dcf,
+          0x405b9de0,
+          0x405c1df3,
+          0x405c9e04,
+          0x405d1e11,
+          0x405d9e28,
+          0x405e1e48,
           0x405e8a95,
-          0x405f1e37,
-          0x405f9e44,
-          0x40601e52,
-          0x40609e74,
-          0x40611e9c,
-          0x40619eb1,
-          0x40621ec8,
-          0x40629ed9,
-          0x40631eea,
-          0x40639eff,
-          0x40641f16,
-          0x40649f27,
-          0x40651f42,
-          0x40659f59,
-          0x40661f71,
-          0x40669f9b,
-          0x40671fc6,
-          0x40679fe7,
-          0x40681ffa,
-          0x4068a01b,
-          0x4069204d,
-          0x4069a07b,
-          0x406a209c,
-          0x406aa0bc,
-          0x406b2244,
-          0x406ba267,
-          0x406c227d,
-          0x406ca4a9,
-          0x406d24d8,
-          0x406da500,
-          0x406e2519,
-          0x406ea531,
-          0x406f2550,
-          0x406fa565,
-          0x40702578,
-          0x4070a595,
+          0x405f1e69,
+          0x405f9e76,
+          0x40601e84,
+          0x40609ea6,
+          0x40611ece,
+          0x40619ee3,
+          0x40621efa,
+          0x40629f0b,
+          0x40631f1c,
+          0x40639f31,
+          0x40641f48,
+          0x40649f59,
+          0x40651f74,
+          0x40659f8b,
+          0x40661fa3,
+          0x40669fcd,
+          0x40671ff8,
+          0x4067a019,
+          0x4068202c,
+          0x4068a04d,
+          0x4069207f,
+          0x4069a0ad,
+          0x406a20ce,
+          0x406aa0ee,
+          0x406b2276,
+          0x406ba299,
+          0x406c22af,
+          0x406ca4db,
+          0x406d250a,
+          0x406da532,
+          0x406e254b,
+          0x406ea563,
+          0x406f2582,
+          0x406fa597,
+          0x407025aa,
+          0x4070a5c7,
           0x40710800,
-          0x4071a5a7,
-          0x407225ba,
-          0x4072a5d3,
-          0x407325eb,
+          0x4071a5d9,
+          0x407225ec,
+          0x4072a605,
+          0x4073261d,
           0x4073936d,
-          0x407425ff,
-          0x4074a619,
-          0x4075262a,
-          0x4075a63e,
-          0x4076264c,
+          0x40742631,
+          0x4074a64b,
+          0x4075265c,
+          0x4075a670,
+          0x4076267e,
           0x407691aa,
-          0x40772671,
-          0x4077a693,
-          0x407826ae,
-          0x4078a6c3,
-          0x407926da,
-          0x4079a6f0,
-          0x407a26fc,
-          0x407aa70f,
-          0x407b2724,
-          0x407ba736,
-          0x407c274b,
-          0x407ca754,
-          0x407d2036,
-          0x407d9bb0,
-          0x41f4216f,
-          0x41f92201,
-          0x41fe20f4,
-          0x41fea2d0,
-          0x41ff23c1,
-          0x42032188,
-          0x420821aa,
-          0x4208a1e6,
-          0x420920d8,
-          0x4209a220,
-          0x420a212f,
-          0x420aa10f,
-          0x420b214f,
-          0x420ba1c8,
-          0x420c23dd,
-          0x420ca29d,
-          0x420d22b7,
-          0x420da2ee,
-          0x42122308,
-          0x421723a4,
-          0x4217a34a,
-          0x421c236c,
-          0x421f2327,
-          0x422123f4,
-          0x42262387,
-          0x422b248d,
-          0x422ba456,
-          0x422c2475,
-          0x422ca430,
-          0x422d240f,
+          0x407726a3,
+          0x4077a6c5,
+          0x407826e0,
+          0x4078a719,
+          0x40792730,
+          0x4079a746,
+          0x407a2752,
+          0x407aa765,
+          0x407b277a,
+          0x407ba78c,
+          0x407c27a1,
+          0x407ca7aa,
+          0x407d2068,
+          0x407d9bc3,
+          0x407e26f5,
+          0x407e9d5b,
+          0x407f1a2a,
+          0x41f421a1,
+          0x41f92233,
+          0x41fe2126,
+          0x41fea302,
+          0x41ff23f3,
+          0x420321ba,
+          0x420821dc,
+          0x4208a218,
+          0x4209210a,
+          0x4209a252,
+          0x420a2161,
+          0x420aa141,
+          0x420b2181,
+          0x420ba1fa,
+          0x420c240f,
+          0x420ca2cf,
+          0x420d22e9,
+          0x420da320,
+          0x4212233a,
+          0x421723d6,
+          0x4217a37c,
+          0x421c239e,
+          0x421f2359,
+          0x42212426,
+          0x422623b9,
+          0x422b24bf,
+          0x422ba488,
+          0x422c24a7,
+          0x422ca462,
+          0x422d2441,
           0x4432072b,
           0x4432873a,
           0x44330746,
@@ -775,69 +781,69 @@ Pod::Spec.new do |s|
           0x4c3d136d,
           0x4c3d937c,
           0x4c3e1389,
-          0x503229cd,
-          0x5032a9dc,
-          0x503329e7,
-          0x5033a9f7,
-          0x50342a10,
-          0x5034aa2a,
-          0x50352a38,
-          0x5035aa4e,
-          0x50362a60,
-          0x5036aa76,
-          0x50372a8f,
-          0x5037aaa2,
-          0x50382aba,
-          0x5038aacb,
-          0x50392ae0,
-          0x5039aaf4,
-          0x503a2b14,
-          0x503aab2a,
-          0x503b2b42,
-          0x503bab54,
-          0x503c2b70,
-          0x503cab87,
-          0x503d2ba0,
-          0x503dabb6,
-          0x503e2bc3,
-          0x503eabd9,
-          0x503f2beb,
+          0x50322a23,
+          0x5032aa32,
+          0x50332a3d,
+          0x5033aa4d,
+          0x50342a66,
+          0x5034aa80,
+          0x50352a8e,
+          0x5035aaa4,
+          0x50362ab6,
+          0x5036aacc,
+          0x50372ae5,
+          0x5037aaf8,
+          0x50382b10,
+          0x5038ab21,
+          0x50392b36,
+          0x5039ab4a,
+          0x503a2b6a,
+          0x503aab80,
+          0x503b2b98,
+          0x503babaa,
+          0x503c2bc6,
+          0x503cabdd,
+          0x503d2bf6,
+          0x503dac0c,
+          0x503e2c19,
+          0x503eac2f,
+          0x503f2c41,
           0x503f8382,
-          0x50402bfe,
-          0x5040ac0e,
-          0x50412c28,
-          0x5041ac37,
-          0x50422c51,
-          0x5042ac6e,
-          0x50432c7e,
-          0x5043ac8e,
-          0x50442c9d,
+          0x50402c54,
+          0x5040ac64,
+          0x50412c7e,
+          0x5041ac8d,
+          0x50422ca7,
+          0x5042acc4,
+          0x50432cd4,
+          0x5043ace4,
+          0x50442cf3,
           0x5044843f,
-          0x50452cb1,
-          0x5045accf,
-          0x50462ce2,
-          0x5046acf8,
-          0x50472d0a,
-          0x5047ad1f,
-          0x50482d45,
-          0x5048ad53,
-          0x50492d66,
-          0x5049ad7b,
-          0x504a2d91,
-          0x504aada1,
-          0x504b2dc1,
-          0x504badd4,
-          0x504c2df7,
-          0x504cae25,
-          0x504d2e37,
-          0x504dae54,
-          0x504e2e6f,
-          0x504eae8b,
-          0x504f2e9d,
-          0x504faeb4,
-          0x50502ec3,
+          0x50452d07,
+          0x5045ad25,
+          0x50462d38,
+          0x5046ad4e,
+          0x50472d60,
+          0x5047ad75,
+          0x50482d9b,
+          0x5048ada9,
+          0x50492dbc,
+          0x5049add1,
+          0x504a2de7,
+          0x504aadf7,
+          0x504b2e17,
+          0x504bae2a,
+          0x504c2e4d,
+          0x504cae7b,
+          0x504d2e8d,
+          0x504daeaa,
+          0x504e2ec5,
+          0x504eaee1,
+          0x504f2ef3,
+          0x504faf0a,
+          0x50502f19,
           0x505086ef,
-          0x50512ed6,
+          0x50512f2c,
           0x58320ec9,
           0x68320e8b,
           0x68328c25,
@@ -1218,6 +1224,7 @@ Pod::Spec.new do |s|
           "DH_PUBLIC_VALUE_LENGTH_IS_WRONG\\0"
           "DH_P_TOO_LONG\\0"
           "DIGEST_CHECK_FAILED\\0"
+          "DOWNGRADE_DETECTED\\0"
           "DTLS_MESSAGE_TOO_BIG\\0"
           "ECC_CERT_NOT_FOR_SIGNING\\0"
           "EMS_STATE_INCONSISTENT\\0"
@@ -1254,6 +1261,7 @@ Pod::Spec.new do |s|
           "NO_CIPHERS_AVAILABLE\\0"
           "NO_CIPHERS_PASSED\\0"
           "NO_CIPHER_MATCH\\0"
+          "NO_COMMON_SIGNATURE_ALGORITHMS\\0"
           "NO_COMPRESSION_SPECIFIED\\0"
           "NO_METHOD_SPECIFIED\\0"
           "NO_P256_SUPPORT\\0"
@@ -1344,6 +1352,7 @@ Pod::Spec.new do |s|
           "UNSUPPORTED_COMPRESSION_ALGORITHM\\0"
           "UNSUPPORTED_ELLIPTIC_CURVE\\0"
           "UNSUPPORTED_PROTOCOL\\0"
+          "UNSUPPORTED_PROTOCOL_FOR_CUSTOM_KEY\\0"
           "WRONG_CERTIFICATE_TYPE\\0"
           "WRONG_CIPHER_RETURNED\\0"
           "WRONG_CURVE\\0"
diff --git a/src/objective-c/ProtoRPC/ProtoRPC.m b/src/objective-c/ProtoRPC/ProtoRPC.m
index e7232f2683..83d1b655e8 100644
--- a/src/objective-c/ProtoRPC/ProtoRPC.m
+++ b/src/objective-c/ProtoRPC/ProtoRPC.m
@@ -33,7 +33,11 @@
 
 #import "ProtoRPC.h"
 
-#import <Protobuf/GPBProtocolBuffers.h>
+#if GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS
+ #import <Protobuf/GPBProtocolBuffers.h>
+#else
+ #import <GPBProtocolBuffers.h>
+#endif
 #import <RxLibrary/GRXWriteable.h>
 #import <RxLibrary/GRXWriter+Transformations.h>
 
diff --git a/src/objective-c/README.md b/src/objective-c/README.md
index a0ca5f448a..6e917ddd81 100644
--- a/src/objective-c/README.md
+++ b/src/objective-c/README.md
@@ -48,7 +48,7 @@ Pod::Spec.new do |s|
   src = '.'
 
   # We'll use protoc with the gRPC plugin.
-  s.dependency '!ProtoCompiler-gRPCPlugin', '~> 0.14'
+  s.dependency '!ProtoCompiler-gRPCPlugin', '~> 1.0.0-pre1'
 
   # Pods directory corresponding to this app's Podfile, relative to the location of this podspec.
   pods_root = '<path to your Podfile>/Pods'
diff --git a/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec b/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
index 6e783fb5ad..7222a80b88 100644
--- a/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
+++ b/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.osx.deployment_target = '10.9'
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 0.14"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
 
   repo_root = '../../../..'
   bin_dir = "#{repo_root}/bins/$CONFIG"
diff --git a/src/objective-c/examples/RemoteTestClient/empty.proto b/src/objective-c/examples/RemoteTestClient/empty.proto
deleted file mode 100644
index a678048289..0000000000
--- a/src/objective-c/examples/RemoteTestClient/empty.proto
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-syntax = "proto3";
-
-package grpc.testing;
-
-option objc_class_prefix = "RMT";
-
-// An empty message that you can re-use to avoid defining duplicated empty
-// messages in your project. A typical example is to use it as argument or the
-// return value of a service API. For instance:
-//
-//   service Foo {
-//     rpc Bar (grpc.testing.Empty) returns (grpc.testing.Empty) { };
-//   };
-//
-message Empty {}
diff --git a/src/objective-c/examples/RemoteTestClient/test.proto b/src/objective-c/examples/RemoteTestClient/test.proto
index 514c3b8095..5c359c5c12 100644
--- a/src/objective-c/examples/RemoteTestClient/test.proto
+++ b/src/objective-c/examples/RemoteTestClient/test.proto
@@ -31,7 +31,7 @@
 // of unary/streaming requests/responses.
 syntax = "proto3";
 
-import "empty.proto";
+import "google/protobuf/empty.proto";
 import "messages.proto";
 
 package grpc.testing;
@@ -42,7 +42,7 @@ option objc_class_prefix = "RMT";
 // performance with various types of payload.
 service TestService {
   // One empty request followed by one empty response.
-  rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
+  rpc EmptyCall(google.protobuf.Empty) returns (google.protobuf.Empty);
 
   // One request followed by one response.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
diff --git a/src/objective-c/examples/Sample/Podfile b/src/objective-c/examples/Sample/Podfile
index 8740b2f963..f6f0c00d5d 100644
--- a/src/objective-c/examples/Sample/Podfile
+++ b/src/objective-c/examples/Sample/Podfile
@@ -3,6 +3,8 @@ platform :ios, '8.0'
 
 install! 'cocoapods', :deterministic_uuids => false
 
+use_frameworks! if ENV['FRAMEWORKS'] == 'YES'
+
 # Location of gRPC's repo root relative to this file.
 GRPC_LOCAL_SRC = '../../../..'
 
diff --git a/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj b/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
index 5c2a6d14f9..ab7159cda2 100644
--- a/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
+++ b/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		426A5020E0E158A101BCA1D9 /* libPods-Sample.a in Frameworks */ = {isa = PBXBuildFile; fileRef = C20055928615A6F8434E26B4 /* libPods-Sample.a */; };
+		3F035697392F601049D3DDE1 /* Pods_Sample.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CC1B27EA0C428429B07BC34B /* Pods_Sample.framework */; };
 		6369A2701A9322E20015FC5C /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A26F1A9322E20015FC5C /* main.m */; };
 		6369A2731A9322E20015FC5C /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2721A9322E20015FC5C /* AppDelegate.m */; };
 		6369A2761A9322E20015FC5C /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2751A9322E20015FC5C /* ViewController.m */; };
@@ -26,7 +26,7 @@
 		6369A2751A9322E20015FC5C /* ViewController.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ViewController.m; sourceTree = "<group>"; };
 		6369A2781A9322E20015FC5C /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		6369A27A1A9322E20015FC5C /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
-		C20055928615A6F8434E26B4 /* libPods-Sample.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-Sample.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		CC1B27EA0C428429B07BC34B /* Pods_Sample.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Sample.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		E3C01DF315C4E7433BCEC6E6 /* Pods-Sample.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Sample.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Sample/Pods-Sample.debug.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -35,7 +35,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				426A5020E0E158A101BCA1D9 /* libPods-Sample.a in Frameworks */,
+				3F035697392F601049D3DDE1 /* Pods_Sample.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -95,7 +95,7 @@
 		C4C2C5219053E079C9EFB930 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
-				C20055928615A6F8434E26B4 /* libPods-Sample.a */,
+				CC1B27EA0C428429B07BC34B /* Pods_Sample.framework */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
@@ -129,7 +129,7 @@
 		6369A2621A9322E20015FC5C /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0610;
+				LastUpgradeCheck = 0730;
 				ORGANIZATIONNAME = gRPC;
 				TargetAttributes = {
 					6369A2691A9322E20015FC5C = {
@@ -260,6 +260,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_OPTIMIZATION_LEVEL = 0;
@@ -325,6 +326,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Sample/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = "org.grpc.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Debug;
@@ -336,6 +338,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Sample/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = "org.grpc.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Release;
diff --git a/src/objective-c/examples/Sample/Sample/Info.plist b/src/objective-c/examples/Sample/Sample/Info.plist
index 4436635ab4..2cdf09dc2f 100644
--- a/src/objective-c/examples/Sample/Sample/Info.plist
+++ b/src/objective-c/examples/Sample/Sample/Info.plist
@@ -7,7 +7,7 @@
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
-	<string>org.grpc.$(PRODUCT_NAME:rfc1034identifier)</string>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.m b/src/objective-c/examples/Sample/Sample/ViewController.m
index 433a8a2ba3..70244ee62d 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.m
+++ b/src/objective-c/examples/Sample/Sample/ViewController.m
@@ -66,9 +66,9 @@
 
   // Same example call using the generic gRPC client library:
 
-  ProtoMethod *method = [[ProtoMethod alloc] initWithPackage:@"grpc.testing"
-                                                     service:@"TestService"
-                                                      method:@"UnaryCall"];
+  GRPCProtoMethod *method = [[GRPCProtoMethod alloc] initWithPackage:@"grpc.testing"
+                                                             service:@"TestService"
+                                                              method:@"UnaryCall"];
 
   GRXWriter *requestsWriter = [GRXWriter writerWithValue:[request data]];
 
diff --git a/src/objective-c/examples/SwiftSample/Bridging-Header.h b/src/objective-c/examples/SwiftSample/Bridging-Header.h
deleted file mode 100644
index 65f768a760..0000000000
--- a/src/objective-c/examples/SwiftSample/Bridging-Header.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef SwiftSample_Bridging_Header_h
-#define SwiftSample_Bridging_Header_h
-
-#import <RxLibrary/GRXWriteable.h>
-#import <RxLibrary/GRXWriter.h>
-#import <RxLibrary/GRXWriter+Immediate.h>
-#import <GRPCClient/GRPCCall.h>
-#import <ProtoRPC/ProtoMethod.h>
-#import <ProtoRPC/ProtoRPC.h>
-#import <RemoteTest/Test.pbrpc.h>
-
-#endif
diff --git a/src/objective-c/examples/SwiftSample/Info.plist b/src/objective-c/examples/SwiftSample/Info.plist
index 10f0450b34..2cdf09dc2f 100644
--- a/src/objective-c/examples/SwiftSample/Info.plist
+++ b/src/objective-c/examples/SwiftSample/Info.plist
@@ -7,7 +7,7 @@
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
-	<string>io.grpc.$(PRODUCT_NAME:rfc1034identifier)</string>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
diff --git a/src/objective-c/examples/SwiftSample/Podfile b/src/objective-c/examples/SwiftSample/Podfile
index 2f783340f5..b08a346ae2 100644
--- a/src/objective-c/examples/SwiftSample/Podfile
+++ b/src/objective-c/examples/SwiftSample/Podfile
@@ -3,6 +3,8 @@ platform :ios, '8.0'
 
 install! 'cocoapods', :deterministic_uuids => false
 
+use_frameworks!
+
 # Location of gRPC's repo root relative to this file.
 GRPC_LOCAL_SRC = '../../../..'
 
diff --git a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
index 2a1b30f2cf..afc3da7116 100644
--- a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
+++ b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
@@ -7,11 +7,11 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		2C0B024CB798839E17F76126 /* Pods_SwiftSample.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B394F343BDE186C5436DBDB9 /* Pods_SwiftSample.framework */; };
 		633BFFC81B950B210007E424 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 633BFFC71B950B210007E424 /* AppDelegate.swift */; };
 		633BFFCA1B950B210007E424 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 633BFFC91B950B210007E424 /* ViewController.swift */; };
 		633BFFCD1B950B210007E424 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 633BFFCB1B950B210007E424 /* Main.storyboard */; };
 		633BFFCF1B950B210007E424 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 633BFFCE1B950B210007E424 /* Images.xcassets */; };
-		92EDB1408A1E1E7DDAB25D9C /* libPods-SwiftSample.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 69BB5C6CA3C1F97E007AC527 /* libPods-SwiftSample.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -21,9 +21,8 @@
 		633BFFC91B950B210007E424 /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
 		633BFFCC1B950B210007E424 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		633BFFCE1B950B210007E424 /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
-		6367AD231B951655007FD3A4 /* Bridging-Header.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "Bridging-Header.h"; sourceTree = "<group>"; };
-		69BB5C6CA3C1F97E007AC527 /* libPods-SwiftSample.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-SwiftSample.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		A7E614A494D89D01BB395761 /* Pods-SwiftSample.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SwiftSample.debug.xcconfig"; path = "Pods/Target Support Files/Pods-SwiftSample/Pods-SwiftSample.debug.xcconfig"; sourceTree = "<group>"; };
+		B394F343BDE186C5436DBDB9 /* Pods_SwiftSample.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_SwiftSample.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		C314E3E246AF23AC29B38FCF /* Pods-SwiftSample.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SwiftSample.release.xcconfig"; path = "Pods/Target Support Files/Pods-SwiftSample/Pods-SwiftSample.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -32,7 +31,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				92EDB1408A1E1E7DDAB25D9C /* libPods-SwiftSample.a in Frameworks */,
+				2C0B024CB798839E17F76126 /* Pods_SwiftSample.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -74,7 +73,6 @@
 				633BFFCB1B950B210007E424 /* Main.storyboard */,
 				633BFFCE1B950B210007E424 /* Images.xcassets */,
 				633BFFC51B950B210007E424 /* Supporting Files */,
-				6367AD231B951655007FD3A4 /* Bridging-Header.h */,
 			);
 			name = SwiftSample;
 			sourceTree = SOURCE_ROOT;
@@ -90,7 +88,7 @@
 		9D63A7F6423989BA306810CA /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
-				69BB5C6CA3C1F97E007AC527 /* libPods-SwiftSample.a */,
+				B394F343BDE186C5436DBDB9 /* Pods_SwiftSample.framework */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
@@ -125,7 +123,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0710;
-				LastUpgradeCheck = 0640;
+				LastUpgradeCheck = 0730;
 				ORGANIZATIONNAME = gRPC;
 				TargetAttributes = {
 					633BFFC11B950B210007E424 = {
@@ -256,6 +254,7 @@
 				COPY_PHASE_STRIP = NO;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -325,8 +324,9 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = "io.grpc.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_OBJC_BRIDGING_HEADER = "Bridging-Header.h";
+				SWIFT_OBJC_BRIDGING_HEADER = "";
 				USER_HEADER_SEARCH_PATHS = "";
 			};
 			name = Debug;
@@ -338,8 +338,9 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = "io.grpc.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_OBJC_BRIDGING_HEADER = "Bridging-Header.h";
+				SWIFT_OBJC_BRIDGING_HEADER = "";
 				USER_HEADER_SEARCH_PATHS = "";
 			};
 			name = Release;
diff --git a/src/objective-c/examples/SwiftSample/ViewController.swift b/src/objective-c/examples/SwiftSample/ViewController.swift
index 2a95d2de51..e7bab13762 100644
--- a/src/objective-c/examples/SwiftSample/ViewController.swift
+++ b/src/objective-c/examples/SwiftSample/ViewController.swift
@@ -33,6 +33,8 @@
 
 import UIKit
 
+import RemoteTest
+
 class ViewController: UIViewController {
 
   override func viewDidLoad() {
@@ -60,7 +62,7 @@ class ViewController: UIViewController {
 
     // Same but manipulating headers:
 
-    var RPC : ProtoRPC! // Needed to convince Swift to capture by reference (__block)
+    var RPC : GRPCProtoCall! // Needed to convince Swift to capture by reference (__block)
     RPC = service.RPCToUnaryCallWithRequest(request) { response, error in
       if let response = response {
         NSLog("2. Finished successfully with response:\n\(response)")
@@ -79,7 +81,7 @@ class ViewController: UIViewController {
 
     // Same example call using the generic gRPC client library:
 
-    let method = ProtoMethod(package: "grpc.testing", service: "TestService", method: "UnaryCall")
+    let method = GRPCProtoMethod(package: "grpc.testing", service: "TestService", method: "UnaryCall")
 
     let requestsWriter = GRXWriter(value: request.data())
 
diff --git a/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m
new file mode 100644
index 0000000000..58abb492ce
--- /dev/null
+++ b/src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m
@@ -0,0 +1,394 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This test file is derived from fixture h2_ssl.c in core end2end test
+ * (test/core/end2end/fixture/h2_ssl.c). The structure of the fixture is
+ * preserved as much as possible
+ *
+ * This fixture creates a server full stack using chttp2 and a client
+ * full stack using Cronet. End-to-end tests are run against this
+ * configuration
+ *
+ */
+
+
+#import <XCTest/XCTest.h>
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/security/credentials/credentials.h"
+#include "src/core/lib/support/env.h"
+#include "src/core/lib/support/string.h"
+#include "src/core/lib/support/tmpfile.h"
+#include "test/core/end2end/data/ssl_test_data.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+#include <grpc/grpc_cronet.h>
+#import <Cronet/Cronet.h>
+
+typedef struct fullstack_secure_fixture_data {
+  char *localaddr;
+} fullstack_secure_fixture_data;
+
+static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
+                                                                        grpc_channel_args *client_args, grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  int port = grpc_pick_unused_port_or_die();
+  fullstack_secure_fixture_data *ffd =
+  gpr_malloc(sizeof(fullstack_secure_fixture_data));
+  memset(&f, 0, sizeof(f));
+  
+  gpr_join_host_port(&ffd->localaddr, "localhost", port);
+  
+  f.fixture_data = ffd;
+  f.cq = grpc_completion_queue_create(NULL);
+  
+  return f;
+}
+
+static void process_auth_failure(void *state, grpc_auth_context *ctx,
+                                 const grpc_metadata *md, size_t md_count,
+                                 grpc_process_auth_metadata_done_cb cb,
+                                 void *user_data) {
+  GPR_ASSERT(state == NULL);
+  cb(user_data, NULL, 0, NULL, 0, GRPC_STATUS_UNAUTHENTICATED, NULL);
+}
+
+static void cronet_init_client_secure_fullstack(
+                                                grpc_end2end_test_fixture *f, grpc_channel_args *client_args,
+                                                cronet_engine *cronetEngine) {
+  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  f->client =
+  grpc_cronet_secure_channel_create(cronetEngine, ffd->localaddr, client_args, NULL);
+  GPR_ASSERT(f->client != NULL);
+}
+
+static void chttp2_init_server_secure_fullstack(
+                                                grpc_end2end_test_fixture *f, grpc_channel_args *server_args,
+                                                grpc_server_credentials *server_creds) {
+  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  if (f->server) {
+    grpc_server_destroy(f->server);
+  }
+  f->server = grpc_server_create(server_args, NULL);
+  grpc_server_register_completion_queue(f->server, f->cq, NULL);
+  GPR_ASSERT(grpc_server_add_secure_http2_port(f->server, ffd->localaddr,
+                                               server_creds));
+  grpc_server_credentials_release(server_creds);
+  grpc_server_start(f->server);
+}
+
+static void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
+  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  gpr_free(ffd->localaddr);
+  gpr_free(ffd);
+}
+
+static void cronet_init_client_simple_ssl_secure_fullstack(
+                                                           grpc_end2end_test_fixture *f, grpc_channel_args *client_args) {
+  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
+    GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
+    {"foo.test.google.fr"}};
+  
+  grpc_channel_args *new_client_args =
+  grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
+  [Cronet setHttp2Enabled:YES];
+  [Cronet start];
+  cronet_engine *cronetEngine = [Cronet getGlobalEngine];
+  
+  cronet_init_client_secure_fullstack(f, new_client_args, cronetEngine);
+  grpc_channel_args_destroy(new_client_args);
+}
+
+static int fail_server_auth_check(grpc_channel_args *server_args) {
+  size_t i;
+  if (server_args == NULL) return 0;
+  for (i = 0; i < server_args->num_args; i++) {
+    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) ==
+        0) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
+static void chttp2_init_server_simple_ssl_secure_fullstack(
+                                                           grpc_end2end_test_fixture *f, grpc_channel_args *server_args) {
+  grpc_ssl_pem_key_cert_pair pem_cert_key_pair = {test_server1_key,
+    test_server1_cert};
+  grpc_server_credentials *ssl_creds =
+  grpc_ssl_server_credentials_create(NULL, &pem_cert_key_pair, 1, 0, NULL);
+  if (fail_server_auth_check(server_args)) {
+    grpc_auth_metadata_processor processor = {process_auth_failure, NULL, NULL};
+    grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
+  }
+  chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
+}
+
+/* All test configurations */
+
+static grpc_end2end_test_config configs[] = {
+  {"chttp2/simple_ssl_fullstack",
+    FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
+    FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS,
+    chttp2_create_fixture_secure_fullstack,
+    cronet_init_client_simple_ssl_secure_fullstack,
+    chttp2_init_server_simple_ssl_secure_fullstack,
+    chttp2_tear_down_secure_fullstack},
+};
+
+
+
+static char *roots_filename;
+
+@interface CoreCronetEnd2EndTests : XCTestCase
+
+@end
+
+@implementation CoreCronetEnd2EndTests
+
+
+// The setUp() function is run before the test cases run and only run once
++ (void)setUp {
+  [super setUp];
+
+  FILE *roots_file;
+  size_t roots_size = strlen(test_root_cert);
+  
+  char *argv[] = {"CoreCronetEnd2EndTests"};
+  grpc_test_init(1, argv);
+  grpc_end2end_tests_pre_init();
+  
+  /* Set the SSL roots env var. */
+  roots_file = gpr_tmpfile("chttp2_simple_ssl_fullstack_test", &roots_filename);
+  GPR_ASSERT(roots_filename != NULL);
+  GPR_ASSERT(roots_file != NULL);
+  GPR_ASSERT(fwrite(test_root_cert, 1, roots_size, roots_file) == roots_size);
+  fclose(roots_file);
+  gpr_setenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR, roots_filename);
+  
+  grpc_init();
+  
+}
+
+// The tearDown() function is run after all test cases finish running
++ (void)tearDown {
+  grpc_shutdown();
+  
+  /* Cleanup. */
+  remove(roots_filename);
+  gpr_free(roots_filename);
+  
+  [super tearDown];
+}
+
+- (void)testIndividualCase:(char*)test_case {
+  char *argv[] = {"h2_ssl", test_case};
+  
+  for (int i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
+    grpc_end2end_tests(sizeof(argv) / sizeof(argv[0]), argv, configs[i]);
+  }
+}
+
+// TODO(mxyan): Use NSStringFromSelector(_cmd) to acquire test name from the
+// test case method name, so that bodies of test cases can stay identical 
+- (void)testBadHostname {
+  [self testIndividualCase:"bad_hostname"];
+}
+
+- (void)testBinaryMetadata {
+  [self testIndividualCase:"binary_metadata"];
+}
+
+- (void)testCallCreds {
+  [self testIndividualCase:"call_creds"];
+}
+
+- (void)testCancelAfterAccept {
+  [self testIndividualCase:"cancel_after_accept"];
+}
+
+- (void)testCancelAfterClientDone {
+  [self testIndividualCase:"cancel_after_client_done"];
+}
+
+- (void)testCancelAfterInvoke {
+  [self testIndividualCase:"cancel_after_invoke"];
+}
+
+- (void)testCancelBeforeInvoke {
+  [self testIndividualCase:"cancel_before_invoke"];
+}
+
+- (void)testCancelInAVacuum {
+  [self testIndividualCase:"cancel_in_a_vacuum"];
+}
+
+- (void)testCancelWithStatus {
+  [self testIndividualCase:"cancel_with_status"];
+}
+
+- (void)testCompressedPayload {
+  [self testIndividualCase:"compressed_payload"];
+}
+
+- (void)testConnectivity {
+  [self testIndividualCase:"connectivity"];
+}
+
+- (void)testDefaultHost {
+  [self testIndividualCase:"default_host"];
+}
+
+- (void)testDisappearingServer {
+  [self testIndividualCase:"disappearing_server"];
+}
+
+- (void)testEmptyBatch {
+  [self testIndividualCase:"empty_batch"];
+}
+
+- (void)testFilterCausesClose {
+  [self testIndividualCase:"filter_causes_close"];
+}
+
+- (void)testGracefulServerShutdown {
+  [self testIndividualCase:"graceful_server_shutdown"];
+}
+
+- (void)testHighInitialSeqno {
+  [self testIndividualCase:"high_initial_seqno"];
+}
+
+- (void)testHpackSize {
+  [self testIndividualCase:"hpack_size"];
+}
+
+- (void)testIdempotentRequest {
+  [self testIndividualCase:"idempotent_request"];
+}
+
+- (void)testInvokeLargeRequest {
+  [self testIndividualCase:"invoke_large_request"];
+}
+
+- (void)testLargeMetadata {
+  [self testIndividualCase:"large_metadata"];
+}
+
+- (void)testMaxConcurrentStreams {
+  [self testIndividualCase:"max_concurrent_streams"];
+}
+
+- (void)testMaxMessageLength {
+  [self testIndividualCase:"max_message_length"];
+}
+
+- (void)testNegativeDeadline {
+  [self testIndividualCase:"negative_deadline"];
+}
+
+- (void)testNetworkStatusChange {
+  [self testIndividualCase:"network_status_change"];
+}
+
+- (void)testNoOp {
+  [self testIndividualCase:"no_op"];
+}
+
+- (void)testPayload {
+  [self testIndividualCase:"payload"];
+}
+
+- (void)testPing {
+  [self testIndividualCase:"ping"];
+}
+
+- (void)testPingPongStreaming {
+  [self testIndividualCase:"ping_pong_streaming"];
+}
+
+- (void)testRegisteredCall {
+  [self testIndividualCase:"registered_call"];
+}
+
+- (void)testRequestWithFlags {
+  [self testIndividualCase:"request_with_flags"];
+}
+
+- (void)testRequestWithPayload {
+  [self testIndividualCase:"request_with_payload"];
+}
+
+- (void)testServerFinishesRequest {
+  [self testIndividualCase:"server_finishes_request"];
+}
+
+- (void)testShutdownFinishesCalls {
+  [self testIndividualCase:"shutdown_finishes_calls"];
+}
+
+- (void)testShutdownFinishesTags {
+  [self testIndividualCase:"shutdown_finishes_tags"];
+}
+
+- (void)testSimpleDelayedRequest {
+  [self testIndividualCase:"simple_delayed_request"];
+}
+
+- (void)testSimpleMetadata {
+  [self testIndividualCase:"simple_metadata"];
+}
+
+- (void)testSimpleRequest {
+  [self testIndividualCase:"simple_request"];
+}
+
+- (void)testStreamingErrorResponse {
+  [self testIndividualCase:"streaming_error_response"];
+}
+
+- (void)testTrailingMetadata {
+  [self testIndividualCase:"trailing_metadata"];
+}
+
+@end
diff --git a/src/objective-c/tests/CoreCronetEnd2EndTests/Info.plist b/src/objective-c/tests/CoreCronetEnd2EndTests/Info.plist
new file mode 100644
index 0000000000..fbeeb96ba6
--- /dev/null
+++ b/src/objective-c/tests/CoreCronetEnd2EndTests/Info.plist
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>gRPC.$(PRODUCT_NAME:rfc1034identifier)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index 17b9740d52..db11208a1b 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -22,17 +22,23 @@ GRPC_LOCAL_SRC = '../../..'
     pod '!ProtoCompiler-gRPCPlugin', :path => "#{GRPC_LOCAL_SRC}/src/objective-c"
 
     pod 'BoringSSL',       :podspec => "#{GRPC_LOCAL_SRC}/src/objective-c", :inhibit_warnings => true
-    pod 'CronetFramework', :podspec => "#{GRPC_LOCAL_SRC}/src/objective-c"
 
     pod 'gRPC',           :path => GRPC_LOCAL_SRC
     pod 'gRPC-Core',      :path => GRPC_LOCAL_SRC
     pod 'gRPC-RxLibrary', :path => GRPC_LOCAL_SRC
     pod 'gRPC-ProtoRPC',  :path => GRPC_LOCAL_SRC
-
     pod 'RemoteTest', :path => "RemoteTestClient"
   end
 end
 
+target 'CoreCronetEnd2EndTests' do
+  pod 'BoringSSL', :podspec => "#{GRPC_LOCAL_SRC}/src/objective-c", :inhibit_warnings => true
+  pod 'CronetFramework', :podspec => "#{GRPC_LOCAL_SRC}/src/objective-c"
+  pod 'gRPC-Core', :path => GRPC_LOCAL_SRC
+  pod 'gRPC-Core/Cronet-Interface', :path => GRPC_LOCAL_SRC
+  pod 'gRPC-Core/Cronet-Tests', :path => GRPC_LOCAL_SRC
+end
+
 # gRPC-Core.podspec needs to be modified to be successfully used for local development. A Podfile's
 # pre_install hook lets us do that. The block passed to it runs after the podspecs are downloaded
 # and before they are installed in the user project.
@@ -69,7 +75,7 @@ post_install do |installer|
     target.build_configurations.each do |config|
       config.build_settings['GCC_TREAT_WARNINGS_AS_ERRORS'] = 'YES'
     end
-    if target.name == 'gRPC-Core'
+    if target.name == 'gRPC-Core' or target.name == 'gRPC-Core.default-Cronet-Interface-Cronet-Tests'
       target.build_configurations.each do |config|
         # TODO(zyc): Remove this setting after the issue is resolved
         # GPR_UNREACHABLE_CODE causes "Control may reach end of non-void
diff --git a/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec b/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
index 7d84a5ae4d..53ba101913 100644
--- a/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
+++ b/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.osx.deployment_target = '10.9'
 
   # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 0.14"
+  s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.0.0-pre1"
 
   repo_root = '../../../..'
   bin_dir = "#{repo_root}/bins/$CONFIG"
diff --git a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
index f9389a4977..2c80b08d03 100644
--- a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
+++ b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
@@ -12,6 +12,9 @@
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+		5E8A5DA71D3840B4000F8BC4 /* CoreCronetEnd2EndTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 5E8A5DA61D3840B4000F8BC4 /* CoreCronetEnd2EndTests.m */; };
+		5E8A5DA91D3840B4000F8BC4 /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; };
+		60D2A57ED559F34428C2EEC5 /* libPods-CoreCronetEnd2EndTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = FBD98AC417B9882D32B19F28 /* libPods-CoreCronetEnd2EndTests.a */; };
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 		635697CD1B14FC11007A7283 /* Tests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635697CC1B14FC11007A7283 /* Tests.m */; };
@@ -38,6 +41,13 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
+		5E8A5DAA1D3840B4000F8BC4 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 635697BF1B14FC11007A7283 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 635697C61B14FC11007A7283;
+			remoteInfo = Tests;
+		};
 		63423F4B1B150A5F006CF63C /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 635697BF1B14FC11007A7283 /* Project object */;
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 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		5E8A5DA11D3840B4000F8BC4 /* Frameworks */ = {
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+			buildActionMask = 2147483647;
+			files = (
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+		};
 		63423F411B150A5F006CF63C /* Frameworks */ = {
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 			buildActionMask = 2147483647;
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 			);
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@@ -215,15 +240,26 @@
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 			);
 			name = Pods;
 			sourceTree = "<group>";
 		};
+		5E8A5DA51D3840B4000F8BC4 /* CoreCronetEnd2EndTests */ = {
+			isa = PBXGroup;
+			children = (
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+			path = CoreCronetEnd2EndTests;
+			sourceTree = "<group>";
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 			children = (
 				635697C91B14FC11007A7283 /* Tests */,
 				63E240CF1B6C63DC005F3B0E /* TestCertificates.bundle */,
+				5E8A5DA51D3840B4000F8BC4 /* CoreCronetEnd2EndTests */,
 				635697C81B14FC11007A7283 /* Products */,
 				51E4650F34F854F41FF053B3 /* Pods */,
 				136D535E19727099B941D7B1 /* Frameworks */,
@@ -239,6 +275,7 @@
 				63DC84231BE15267000708E8 /* InteropTestsRemote.xctest */,
 				63DC84341BE15294000708E8 /* InteropTestsLocalSSL.xctest */,
 				63DC84431BE152B5000708E8 /* InteropTestsLocalCleartext.xctest */,
+				5E8A5DA41D3840B4000F8BC4 /* CoreCronetEnd2EndTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -270,6 +307,27 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
+		5E8A5DA31D3840B4000F8BC4 /* CoreCronetEnd2EndTests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 5E8A5DAE1D3840B4000F8BC4 /* Build configuration list for PBXNativeTarget "CoreCronetEnd2EndTests" */;
+			buildPhases = (
+				F58F17E425446B15028B9F74 /* [CP] Check Pods Manifest.lock */,
+				5E8A5DA01D3840B4000F8BC4 /* Sources */,
+				5E8A5DA11D3840B4000F8BC4 /* Frameworks */,
+				5E8A5DA21D3840B4000F8BC4 /* Resources */,
+				E63468C760D0724F18861822 /* [CP] Embed Pods Frameworks */,
+				6DFE9E77CAB5760196D79E0F /* [CP] Copy Pods Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				5E8A5DAB1D3840B4000F8BC4 /* PBXTargetDependency */,
+			);
+			name = CoreCronetEnd2EndTests;
+			productName = CoreCronetEnd2EndTests;
+			productReference = 5E8A5DA41D3840B4000F8BC4 /* CoreCronetEnd2EndTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 		63423F431B150A5F006CF63C /* AllTests */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63423F4D1B150A5F006CF63C /* Build configuration list for PBXNativeTarget "AllTests" */;
@@ -403,6 +461,9 @@
 				LastUpgradeCheck = 0630;
 				ORGANIZATIONNAME = gRPC;
 				TargetAttributes = {
+					5E8A5DA31D3840B4000F8BC4 = {
+						CreatedOnToolsVersion = 7.3.1;
+					};
 					63423F431B150A5F006CF63C = {
 						CreatedOnToolsVersion = 6.3.1;
 					};
@@ -441,11 +502,19 @@
 				63DC84221BE15267000708E8 /* InteropTestsRemote */,
 				63DC84331BE15294000708E8 /* InteropTestsLocalSSL */,
 				63DC84421BE152B5000708E8 /* InteropTestsLocalCleartext */,
+				5E8A5DA31D3840B4000F8BC4 /* CoreCronetEnd2EndTests */,
 			);
 		};
 /* End PBXProject section */
 
 /* Begin PBXResourcesBuildPhase section */
+		5E8A5DA21D3840B4000F8BC4 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		63423F421B150A5F006CF63C /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -561,6 +630,21 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsLocalSSL/Pods-InteropTestsLocalSSL-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
+		6DFE9E77CAB5760196D79E0F /* [CP] Copy Pods Resources */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Copy Pods Resources";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-CoreCronetEnd2EndTests/Pods-CoreCronetEnd2EndTests-resources.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		7418AC7B3844B29E48D24FC7 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -741,9 +825,47 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RxLibraryUnitTests/Pods-RxLibraryUnitTests-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
+		E63468C760D0724F18861822 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-CoreCronetEnd2EndTests/Pods-CoreCronetEnd2EndTests-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		F58F17E425446B15028B9F74 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
+		5E8A5DA01D3840B4000F8BC4 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				5E8A5DA71D3840B4000F8BC4 /* CoreCronetEnd2EndTests.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		63423F401B150A5F006CF63C /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -804,6 +926,11 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		5E8A5DAB1D3840B4000F8BC4 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 635697C61B14FC11007A7283 /* Tests */;
+			targetProxy = 5E8A5DAA1D3840B4000F8BC4 /* PBXContainerItemProxy */;
+		};
 		63423F4C1B150A5F006CF63C /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 635697C61B14FC11007A7283 /* Tests */;
@@ -832,6 +959,38 @@
 /* End PBXTargetDependency section */
 
 /* Begin XCBuildConfiguration section */
+		5E8A5DAC1D3840B4000F8BC4 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 0D2284C3DF7E57F0ED504E39 /* Pods-CoreCronetEnd2EndTests.debug.xcconfig */;
+			buildSettings = {
+				CLANG_ANALYZER_NONNULL = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_TESTABILITY = YES;
+				INFOPLIST_FILE = CoreCronetEnd2EndTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = io.grpc.CoreCronetEnd2EndTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				USER_HEADER_SEARCH_PATHS = "$(inherited) \"${PODS_ROOT}/../../../..\"";
+			};
+			name = Debug;
+		};
+		5E8A5DAD1D3840B4000F8BC4 /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 4AD97096D13D7416DC91A72A /* Pods-CoreCronetEnd2EndTests.release.xcconfig */;
+			buildSettings = {
+				CLANG_ANALYZER_NONNULL = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				INFOPLIST_FILE = CoreCronetEnd2EndTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = io.grpc.CoreCronetEnd2EndTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				USER_HEADER_SEARCH_PATHS = "$(inherited) \"${PODS_ROOT}/../../../..\"";
+			};
+			name = Release;
+		};
 		63423F4E1B150A5F006CF63C /* Debug */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = B94C27C06733CF98CE1B2757 /* Pods-AllTests.debug.xcconfig */;
@@ -1071,6 +1230,15 @@
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		5E8A5DAE1D3840B4000F8BC4 /* Build configuration list for PBXNativeTarget "CoreCronetEnd2EndTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				5E8A5DAC1D3840B4000F8BC4 /* Debug */,
+				5E8A5DAD1D3840B4000F8BC4 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		63423F4D1B150A5F006CF63C /* Build configuration list for PBXNativeTarget "AllTests" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
diff --git a/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/CoreCronetEnd2EndTests.xcscheme b/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/CoreCronetEnd2EndTests.xcscheme
new file mode 100644
index 0000000000..a1da2e0c97
--- /dev/null
+++ b/src/objective-c/tests/Tests.xcodeproj/xcshareddata/xcschemes/CoreCronetEnd2EndTests.xcscheme
@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "NO"
+            buildForArchiving = "NO"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "5E8A5DA31D3840B4000F8BC4"
+               BuildableName = "CoreCronetEnd2EndTests.xctest"
+               BlueprintName = "CoreCronetEnd2EndTests"
+               ReferencedContainer = "container:Tests.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "5E8A5DA31D3840B4000F8BC4"
+               BuildableName = "CoreCronetEnd2EndTests.xctest"
+               BlueprintName = "CoreCronetEnd2EndTests"
+               ReferencedContainer = "container:Tests.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E8A5DA31D3840B4000F8BC4"
+            BuildableName = "CoreCronetEnd2EndTests.xctest"
+            BlueprintName = "CoreCronetEnd2EndTests"
+            ReferencedContainer = "container:Tests.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E8A5DA31D3840B4000F8BC4"
+            BuildableName = "CoreCronetEnd2EndTests.xctest"
+            BlueprintName = "CoreCronetEnd2EndTests"
+            ReferencedContainer = "container:Tests.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E8A5DA31D3840B4000F8BC4"
+            BuildableName = "CoreCronetEnd2EndTests.xctest"
+            BlueprintName = "CoreCronetEnd2EndTests"
+            ReferencedContainer = "container:Tests.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/src/objective-c/tests/build_example_test.sh b/src/objective-c/tests/build_example_test.sh
index 5c3766b4c0..ae75941ec6 100755
--- a/src/objective-c/tests/build_example_test.sh
+++ b/src/objective-c/tests/build_example_test.sh
@@ -31,44 +31,33 @@
 # Don't run this script standalone. Instead, run from the repository root:
 # ./tools/run_tests/run_tests.py -l objc
 
-set -eo pipefail
+set -evo pipefail
 
 cd `dirname $0`
 
-BINDIR=`pwd`/../../../bins/$CONFIG
-TMP_PATH=$PATH
-
-# If `protoc` is not found, add bins/$CONFIG/protobuf/protoc to the search path
-hash protoc 2>/dev/null || TMP_PATH=$BINDIR/protobuf:$TMP_PATH
-
-# If `protoc-gen-objcgrpc` is not found, make a symlink from
-# bins/$CONGIF/grpc_objective_c_plugin and add it to the search path
-PATH=$TMP_PATH hash protoc-gen-objcgrpc 2>/dev/null || {
-  ln -sf $BINDIR/grpc_objective_c_plugin $BINDIR/protoc-gen-objcgrpc
-  TMP_PATH=$BINDIR:$TMP_PATH
-}
-
 SCHEME=HelloWorld                              \
   EXAMPLE_PATH=examples/objective-c/helloworld \
-  PATH=$TMP_PATH                               \
   ./build_one_example.sh
 
 SCHEME=RouteGuideClient                         \
   EXAMPLE_PATH=examples/objective-c/route_guide \
-  PATH=$TMP_PATH                                \
   ./build_one_example.sh
 
 SCHEME=AuthSample                               \
   EXAMPLE_PATH=examples/objective-c/auth_sample \
-  PATH=$TMP_PATH                                \
+  ./build_one_example.sh
+
+rm -f ../examples/RemoteTestClient/*.{h,m}
+
+SCHEME=Sample                                  \
+  EXAMPLE_PATH=src/objective-c/examples/Sample \
   ./build_one_example.sh
 
 SCHEME=Sample                                  \
   EXAMPLE_PATH=src/objective-c/examples/Sample \
-  PATH=$TMP_PATH                               \
+  FRAMEWORKS=YES                               \
   ./build_one_example.sh
 
 SCHEME=SwiftSample                                  \
   EXAMPLE_PATH=src/objective-c/examples/SwiftSample \
-  PATH=$TMP_PATH                                    \
   ./build_one_example.sh
diff --git a/src/objective-c/tests/build_one_example.sh b/src/objective-c/tests/build_one_example.sh
index 24fb8b7bab..9fef6582a3 100755
--- a/src/objective-c/tests/build_one_example.sh
+++ b/src/objective-c/tests/build_one_example.sh
@@ -31,7 +31,7 @@
 # Don't run this script standalone. Instead, run from the repository root:
 # ./tools/run_tests/run_tests.py -l objc
 
-set -e
+set -ev
 
 # Params:
 # EXAMPLE_PATH - directory of the example
@@ -54,7 +54,7 @@ pod install
 set -o pipefail
 XCODEBUILD_FILTER='(^===|^\*\*|\bfatal\b|\berror\b|\bwarning\b|\bfail)'
 xcodebuild \
-    clean build \
+    build \
     -workspace *.xcworkspace \
     -scheme $SCHEME \
     -destination name="iPhone 6" \
diff --git a/src/objective-c/tests/build_tests.sh b/src/objective-c/tests/build_tests.sh
index 8547bfd3a8..bc5bc04494 100755
--- a/src/objective-c/tests/build_tests.sh
+++ b/src/objective-c/tests/build_tests.sh
@@ -44,26 +44,10 @@ hash xcodebuild 2>/dev/null || {
     exit 1
 }
 
-BINDIR=../../../bins/$CONFIG
-
-if [ ! -f $BINDIR/protobuf/protoc ]; then
-    hash protoc 2>/dev/null || {
-        echo >&2 "Can't find protoc. Make sure run_tests.py is making" \
-                 "grpc_objective_c_plugin before calling this script."
-        exit 1
-    }
-    # When protoc is already installed, make doesn't compile one. Put a link
-    # there so the podspecs can do codegen using that path.
-    mkdir -p $BINDIR/protobuf
-    ln -s `which protoc` $BINDIR/protobuf/protoc
-fi
-
-[ -f $BINDIR/interop_server ] || {
-    echo >&2 "Can't find the test server. Make sure run_tests.py is making" \
-             "interop_server before calling this script. It needs to be done" \
-             "before because pod install of gRPC renames some C gRPC files" \
-             "and not the server's code references to them."
-    exit 1
-}
+# clean the directory
+rm -rf Pods
+rm -rf Tests.xcworkspace
+rm -f Podfile.lock
+rm -f RemoteTestClient/*.{h,m}
 
 pod install
diff --git a/src/objective-c/tests/run_tests.sh b/src/objective-c/tests/run_tests.sh
index c4fc5644f2..a265149f48 100755
--- a/src/objective-c/tests/run_tests.sh
+++ b/src/objective-c/tests/run_tests.sh
@@ -31,13 +31,21 @@
 # Don't run this script standalone. Instead, run from the repository root:
 # ./tools/run_tests/run_tests.py -l objc
 
-set -e
+set -ev
 
 cd $(dirname $0)
 
 # Run the tests server.
-../../../bins/$CONFIG/interop_server --port=5050 &
-../../../bins/$CONFIG/interop_server --port=5051 --use_tls &
+
+BINDIR=../../../bins/$CONFIG
+
+[ -f $BINDIR/interop_server ] || {
+    echo >&2 "Can't find the test server. Make sure run_tests.py is making" \
+             "interop_server before calling this script."
+    exit 1
+}
+$BINDIR/interop_server --port=5050 &
+$BINDIR/interop_server --port=5051 --use_tls &
 # Kill them when this script exits.
 trap 'kill -9 `jobs -p`' EXIT
 
diff --git a/src/php/bin/determine_extension_dir.sh b/src/php/bin/determine_extension_dir.sh
index b4342ac89f..a59882506f 100755
--- a/src/php/bin/determine_extension_dir.sh
+++ b/src/php/bin/determine_extension_dir.sh
@@ -29,11 +29,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 set -e
 default_extension_dir=$(php-config --extension-dir)
-if command -v brew > /dev/null && \
-   brew ls --versions | grep php5[56]-grpc > /dev/null; then
-  # the grpc php extension was installed by homebrew
-  :
-elif [ ! -e $default_extension_dir/grpc.so ]; then
+if [ ! -e $default_extension_dir/grpc.so ]; then
   # the grpc extension is not found in the default PHP extension dir
   # try the source modules directory
   module_dir=../ext/grpc/modules
diff --git a/src/php/composer.json b/src/php/composer.json
index 23bfcedbe6..88418206e8 100644
--- a/src/php/composer.json
+++ b/src/php/composer.json
@@ -8,7 +8,7 @@
   "version": "1.0.0",
   "require": {
     "php": ">=5.5.0",
-    "stanley-cheung/protobuf-php": "dev-master",
+    "stanley-cheung/protobuf-php": "v0.6",
     "google/auth": "v0.9"
   },
   "autoload": {
diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index 2cd45f10dc..bd1eccb01b 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -59,12 +59,15 @@
 
 zend_class_entry *grpc_ce_call;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instance of wrapped_grpc_call */
 void free_wrapped_grpc_call(void *object TSRMLS_DC) {
   wrapped_grpc_call *call = (wrapped_grpc_call *)object;
   if (call->owned && call->wrapped != NULL) {
     grpc_call_destroy(call->wrapped);
   }
+  zend_object_std_dtor(&call->std TSRMLS_CC);
   efree(call);
 }
 
@@ -203,6 +206,131 @@ bool create_metadata_array(zval *array, grpc_metadata_array *metadata) {
   return true;
 }
 
+#else
+
+static zend_object_handlers call_ce_handlers;
+
+/* Frees and destroys an instance of wrapped_grpc_call */
+static void free_wrapped_grpc_call(zend_object *object) {
+  wrapped_grpc_call *call = wrapped_grpc_call_from_obj(object);
+  if (call->owned && call->wrapped != NULL) {
+    grpc_call_destroy(call->wrapped);
+  }
+  zend_object_std_dtor(&call->std);
+}
+
+/* Initializes an instance of wrapped_grpc_call to be associated with an
+ * object of a class specified by class_type */
+zend_object *create_wrapped_grpc_call(zend_class_entry *class_type) {
+  wrapped_grpc_call *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_call) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &call_ce_handlers;
+  return &intern->std;
+}
+
+/* Wraps a grpc_call struct in a PHP object. Owned indicates whether the
+   struct should be destroyed at the end of the object's lifecycle */
+void grpc_php_wrap_call(grpc_call *wrapped, bool owned, zval *call_object) {
+  object_init_ex(call_object, grpc_ce_call);
+  wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(call_object);
+  call->wrapped = wrapped;
+  call->owned = owned;
+}
+
+/* Creates and returns a PHP array object with the data in a
+ * grpc_metadata_array. Returns NULL on failure */
+void grpc_parse_metadata_array(grpc_metadata_array *metadata_array,
+                               zval *array) {
+  int count = metadata_array->count;
+  grpc_metadata *elements = metadata_array->metadata;
+  int i;
+  zval *data;
+  HashTable *array_hash;
+  zval inner_array;
+  char *str_key;
+  char *str_val;
+  size_t key_len;
+
+  array_init(array);
+  array_hash = HASH_OF(array);
+  grpc_metadata *elem;
+  for (i = 0; i < count; i++) {
+    elem = &elements[i];
+    key_len = strlen(elem->key);
+    str_key = ecalloc(key_len + 1, sizeof(char));
+    memcpy(str_key, elem->key, key_len);
+    str_val = ecalloc(elem->value_length + 1, sizeof(char));
+    memcpy(str_val, elem->value, elem->value_length);
+    if ((data = zend_hash_str_find(array_hash, str_key, key_len)) != NULL) {
+      if (Z_TYPE_P(data) != IS_ARRAY) {
+        zend_throw_exception(zend_exception_get_default(),
+                             "Metadata hash somehow contains wrong types.",
+                             1);
+        efree(str_key);
+        efree(str_val);
+        return;
+      }
+      add_next_index_stringl(data, str_val, elem->value_length);
+    } else {
+      array_init(&inner_array);
+      add_next_index_stringl(&inner_array, str_val, elem->value_length);
+      add_assoc_zval(array, str_key, &inner_array);
+    }
+  }
+}
+
+/* Populates a grpc_metadata_array with the data in a PHP array object.
+   Returns true on success and false on failure */
+bool create_metadata_array(zval *array, grpc_metadata_array *metadata) {
+  zval *inner_array;
+  zval *value;
+  HashTable *array_hash;
+  HashTable *inner_array_hash;
+  zend_string *key;
+  if (Z_TYPE_P(array) != IS_ARRAY) {
+    return false;
+  }
+  grpc_metadata_array_init(metadata);
+  array_hash = HASH_OF(array);
+
+  ZEND_HASH_FOREACH_STR_KEY_VAL(array_hash, key, inner_array) {
+    if (key == NULL) {
+      return false;
+    }
+    if (Z_TYPE_P(inner_array) != IS_ARRAY) {
+      return false;
+    }
+    inner_array_hash = HASH_OF(inner_array);
+    metadata->capacity += zend_hash_num_elements(inner_array_hash);
+  }
+  ZEND_HASH_FOREACH_END();
+
+  metadata->metadata = gpr_malloc(metadata->capacity * sizeof(grpc_metadata));
+
+  ZEND_HASH_FOREACH_STR_KEY_VAL(array_hash, key, inner_array) {
+    if (key == NULL) {
+      return false;
+    }
+    inner_array_hash = HASH_OF(inner_array);
+
+    ZEND_HASH_FOREACH_VAL(inner_array_hash, value) {
+      if (Z_TYPE_P(value) != IS_STRING) {
+        return false;
+      }
+      metadata->metadata[metadata->count].key = ZSTR_VAL(key);
+      metadata->metadata[metadata->count].value = Z_STRVAL_P(value);
+      metadata->metadata[metadata->count].value_length = Z_STRLEN_P(value);
+      metadata->count += 1;
+    } ZEND_HASH_FOREACH_END();
+  } ZEND_HASH_FOREACH_END();
+  return true;
+}
+
+#endif
+
 /**
  * Constructs a new instance of the Call class.
  * @param Channel $channel The channel to associate the call with. Must not be
@@ -211,30 +339,38 @@ bool create_metadata_array(zval *array, grpc_metadata_array *metadata) {
  * @param Timeval $absolute_deadline The deadline for completing the call
  */
 PHP_METHOD(Call, __construct) {
-  wrapped_grpc_call *call =
-      (wrapped_grpc_call *)zend_object_store_get_object(getThis() TSRMLS_CC);
   zval *channel_obj;
   char *method;
-  int method_len;
   zval *deadline_obj;
   char *host_override = NULL;
+#if PHP_MAJOR_VERSION < 7
+  int method_len;
   int host_override_len = 0;
+  wrapped_grpc_call *call =
+      (wrapped_grpc_call *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  size_t method_len;
+  size_t host_override_len = 0;
+  wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(getThis());
+#endif
+
   /* "OsO|s" == 1 Object, 1 string, 1 Object, 1 optional string */
-  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OsO|s",
-                            &channel_obj, grpc_ce_channel,
-                            &method, &method_len,
-                            &deadline_obj, grpc_ce_timeval,
-                            &host_override, &host_override_len)
-      == FAILURE) {
-    zend_throw_exception(
-        spl_ce_InvalidArgumentException,
-        "Call expects a Channel, a String, a Timeval and an optional String",
-        1 TSRMLS_CC);
+  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OsO|s", &channel_obj,
+                            grpc_ce_channel, &method, &method_len,
+                            &deadline_obj, grpc_ce_timeval, &host_override,
+                            &host_override_len) == FAILURE) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "Call expects a Channel, a String, a Timeval and "
+                         "an optional String", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_channel *channel =
       (wrapped_grpc_channel *)zend_object_store_get_object(
           channel_obj TSRMLS_CC);
+#else
+  wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(channel_obj);
+#endif
   if (channel->wrapped == NULL) {
     zend_throw_exception(spl_ce_InvalidArgumentException,
                          "Call cannot be constructed from a closed Channel",
@@ -242,12 +378,17 @@ PHP_METHOD(Call, __construct) {
     return;
   }
   add_property_zval(getThis(), "channel", channel_obj);
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *deadline =
       (wrapped_grpc_timeval *)zend_object_store_get_object(
           deadline_obj TSRMLS_CC);
-  call->wrapped = grpc_channel_create_call(
-      channel->wrapped, NULL, GRPC_PROPAGATE_DEFAULTS, completion_queue, method,
-      host_override, deadline->wrapped, NULL);
+#else
+  wrapped_grpc_timeval *deadline = Z_WRAPPED_GRPC_TIMEVAL_P(deadline_obj);
+#endif
+  call->wrapped =
+    grpc_channel_create_call(channel->wrapped, NULL, GRPC_PROPAGATE_DEFAULTS,
+                             completion_queue, method, host_override,
+                             deadline->wrapped, NULL);
   call->owned = true;
 }
 
@@ -257,22 +398,40 @@ PHP_METHOD(Call, __construct) {
  * @return object Object with results of all actions
  */
 PHP_METHOD(Call, startBatch) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_call *call =
       (wrapped_grpc_call *)zend_object_store_get_object(getThis() TSRMLS_CC);
-  grpc_op ops[8];
-  size_t op_num = 0;
-  zval *array;
   zval **value;
   zval **inner_value;
-  HashTable *array_hash;
   HashPosition array_pointer;
-  HashTable *status_hash;
-  HashTable *message_hash;
   zval **message_value;
   zval **message_flags;
   char *key;
   uint key_len;
   ulong index;
+  zval *result;
+  zval *recv_status;
+  MAKE_STD_ZVAL(result);
+  object_init(result);
+#else
+  wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(getThis());
+  zval *value;
+  zval *inner_value;
+  zval *message_value;
+  zval *message_flags;
+  zend_string *key;
+  zend_ulong index;
+  zval recv_status;
+  object_init(return_value);
+#endif
+  
+  grpc_op ops[8];
+  size_t op_num = 0;
+  zval *array;
+  HashTable *array_hash;
+  HashTable *status_hash;
+  HashTable *message_hash;
+
   grpc_metadata_array metadata;
   grpc_metadata_array trailing_metadata;
   grpc_metadata_array recv_metadata;
@@ -283,17 +442,16 @@ PHP_METHOD(Call, startBatch) {
   grpc_byte_buffer *message;
   int cancelled;
   grpc_call_error error;
-  zval *result;
   char *message_str;
   size_t message_len;
-  zval *recv_status;
+
+
   grpc_metadata_array_init(&metadata);
   grpc_metadata_array_init(&trailing_metadata);
   grpc_metadata_array_init(&recv_metadata);
   grpc_metadata_array_init(&recv_trailing_metadata);
-  MAKE_STD_ZVAL(result);
-  object_init(result);
   memset(ops, 0, sizeof(ops));
+  
   /* "a" == 1 array */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a", &array) ==
       FAILURE) {
@@ -301,6 +459,9 @@ PHP_METHOD(Call, startBatch) {
                          "start_batch expects an array", 1 TSRMLS_CC);
     goto cleanup;
   }
+
+#if PHP_MAJOR_VERSION < 7
+
   array_hash = Z_ARRVAL_P(array);
   for (zend_hash_internal_pointer_reset_ex(array_hash, &array_pointer);
        zend_hash_get_current_data_ex(array_hash, (void**)&value,
@@ -313,124 +474,250 @@ PHP_METHOD(Call, startBatch) {
       goto cleanup;
     }
     switch(index) {
-      case GRPC_OP_SEND_INITIAL_METADATA:
-        if (!create_metadata_array(*value, &metadata)) {
+    case GRPC_OP_SEND_INITIAL_METADATA:
+      if (!create_metadata_array(*value, &metadata)) {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Bad metadata value given", 1 TSRMLS_CC);
+        goto cleanup;
+      }
+      ops[op_num].data.send_initial_metadata.count =
+          metadata.count;
+      ops[op_num].data.send_initial_metadata.metadata =
+          metadata.metadata;
+      break;
+    case GRPC_OP_SEND_MESSAGE:
+      if (Z_TYPE_PP(value) != IS_ARRAY) {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Expected an array for send message",
+                             1 TSRMLS_CC);
+        goto cleanup;
+      }
+      message_hash = Z_ARRVAL_PP(value);
+      if (zend_hash_find(message_hash, "flags", sizeof("flags"),
+                         (void **)&message_flags) == SUCCESS) {
+        if (Z_TYPE_PP(message_flags) != IS_LONG) {
           zend_throw_exception(spl_ce_InvalidArgumentException,
-                               "Bad metadata value given", 1 TSRMLS_CC);
-          goto cleanup;
+                               "Expected an int for message flags",
+                               1 TSRMLS_CC);
         }
-        ops[op_num].data.send_initial_metadata.count =
-            metadata.count;
-        ops[op_num].data.send_initial_metadata.metadata =
-            metadata.metadata;
-        break;
-      case GRPC_OP_SEND_MESSAGE:
-        if (Z_TYPE_PP(value) != IS_ARRAY) {
+        ops[op_num].flags = Z_LVAL_PP(message_flags) & GRPC_WRITE_USED_MASK;
+      }
+      if (zend_hash_find(message_hash, "message", sizeof("message"),
+                         (void **)&message_value) != SUCCESS ||
+          Z_TYPE_PP(message_value) != IS_STRING) {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Expected a string for send message",
+                             1 TSRMLS_CC);
+        goto cleanup;
+      }
+      ops[op_num].data.send_message =
+          string_to_byte_buffer(Z_STRVAL_PP(message_value),
+                                Z_STRLEN_PP(message_value));
+      break;
+    case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+      break;
+    case GRPC_OP_SEND_STATUS_FROM_SERVER:
+      status_hash = Z_ARRVAL_PP(value);
+      if (zend_hash_find(status_hash, "metadata", sizeof("metadata"),
+                         (void **)&inner_value) == SUCCESS) {
+        if (!create_metadata_array(*inner_value, &trailing_metadata)) {
           zend_throw_exception(spl_ce_InvalidArgumentException,
-                               "Expected an array for send message",
+                               "Bad trailing metadata value given",
                                1 TSRMLS_CC);
           goto cleanup;
         }
-        message_hash = Z_ARRVAL_PP(value);
-        if (zend_hash_find(message_hash, "flags", sizeof("flags"),
-                           (void **)&message_flags) == SUCCESS) {
-          if (Z_TYPE_PP(message_flags) != IS_LONG) {
-            zend_throw_exception(spl_ce_InvalidArgumentException,
-                                 "Expected an int for message flags",
-                                 1 TSRMLS_CC);
-          }
-          ops[op_num].flags = Z_LVAL_PP(message_flags) & GRPC_WRITE_USED_MASK;
+        ops[op_num].data.send_status_from_server.trailing_metadata =
+            trailing_metadata.metadata;
+        ops[op_num].data.send_status_from_server.trailing_metadata_count =
+            trailing_metadata.count;
+      }
+      if (zend_hash_find(status_hash, "code", sizeof("code"),
+                         (void**)&inner_value) == SUCCESS) {
+        if (Z_TYPE_PP(inner_value) != IS_LONG) {
+          zend_throw_exception(spl_ce_InvalidArgumentException,
+                               "Status code must be an integer",
+                               1 TSRMLS_CC);
+          goto cleanup;
         }
-        if (zend_hash_find(message_hash, "message", sizeof("message"),
-                           (void **)&message_value) != SUCCESS ||
-            Z_TYPE_PP(message_value) != IS_STRING) {
+        ops[op_num].data.send_status_from_server.status =
+            Z_LVAL_PP(inner_value);
+      } else {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Integer status code is required",
+                             1 TSRMLS_CC);
+        goto cleanup;
+      }
+      if (zend_hash_find(status_hash, "details", sizeof("details"),
+                         (void**)&inner_value) == SUCCESS) {
+        if (Z_TYPE_PP(inner_value) != IS_STRING) {
           zend_throw_exception(spl_ce_InvalidArgumentException,
-                               "Expected a string for send message",
+                               "Status details must be a string",
                                1 TSRMLS_CC);
           goto cleanup;
         }
-        ops[op_num].data.send_message =
-            string_to_byte_buffer(Z_STRVAL_PP(message_value),
-                                  Z_STRLEN_PP(message_value));
-        break;
-      case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
-        break;
-      case GRPC_OP_SEND_STATUS_FROM_SERVER:
-        status_hash = Z_ARRVAL_PP(value);
-        if (zend_hash_find(status_hash, "metadata", sizeof("metadata"),
-                           (void **)&inner_value) == SUCCESS) {
-          if (!create_metadata_array(*inner_value, &trailing_metadata)) {
-            zend_throw_exception(spl_ce_InvalidArgumentException,
-                                 "Bad trailing metadata value given",
-                                 1 TSRMLS_CC);
-            goto cleanup;
-          }
-          ops[op_num].data.send_status_from_server.trailing_metadata =
-              trailing_metadata.metadata;
-          ops[op_num].data.send_status_from_server.trailing_metadata_count =
-              trailing_metadata.count;
+        ops[op_num].data.send_status_from_server.status_details =
+            Z_STRVAL_PP(inner_value);
+      } else {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "String status details is required",
+                             1 TSRMLS_CC);
+        goto cleanup;
+      }
+      break;
+    case GRPC_OP_RECV_INITIAL_METADATA:
+      ops[op_num].data.recv_initial_metadata = &recv_metadata;
+      break;
+    case GRPC_OP_RECV_MESSAGE:
+      ops[op_num].data.recv_message = &message;
+      break;
+    case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      ops[op_num].data.recv_status_on_client.trailing_metadata =
+          &recv_trailing_metadata;
+      ops[op_num].data.recv_status_on_client.status = &status;
+      ops[op_num].data.recv_status_on_client.status_details =
+          &status_details;
+      ops[op_num].data.recv_status_on_client.status_details_capacity =
+          &status_details_capacity;
+      break;
+    case GRPC_OP_RECV_CLOSE_ON_SERVER:
+      ops[op_num].data.recv_close_on_server.cancelled = &cancelled;
+      break;
+    default:
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "Unrecognized key in batch", 1 TSRMLS_CC);
+      goto cleanup;
+    }
+    ops[op_num].op = (grpc_op_type)index;
+    ops[op_num].flags = 0;
+    ops[op_num].reserved = NULL;
+    op_num++;
+  }
+
+#else
+
+array_hash = HASH_OF(array);
+  ZEND_HASH_FOREACH_KEY_VAL(array_hash, index, key, value) {
+    if (key) {
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "batch keys must be integers", 1);
+      goto cleanup;
+    }
+
+    switch(index) {
+    case GRPC_OP_SEND_INITIAL_METADATA:
+      if (!create_metadata_array(value, &metadata)) {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Bad metadata value given", 1);
+        goto cleanup;
+      }
+      ops[op_num].data.send_initial_metadata.count = metadata.count;
+      ops[op_num].data.send_initial_metadata.metadata = metadata.metadata;
+      break;
+    case GRPC_OP_SEND_MESSAGE:
+      if (Z_TYPE_P(value) != IS_ARRAY) {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Expected an array for send message", 1);
+        goto cleanup;
+      }
+      message_hash = HASH_OF(value);
+      if ((message_flags =
+           zend_hash_str_find(message_hash, "flags",
+                              sizeof("flags") - 1)) != NULL) {
+        if (Z_TYPE_P(message_flags) != IS_LONG) {
+          zend_throw_exception(spl_ce_InvalidArgumentException,
+                               "Expected an int for message flags", 1);
+        }
+        ops[op_num].flags = Z_LVAL_P(message_flags) & GRPC_WRITE_USED_MASK;
+      }
+      if ((message_value = zend_hash_str_find(message_hash, "message",
+                                              sizeof("message") - 1))
+          == NULL || Z_TYPE_P(message_value) != IS_STRING) {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Expected a string for send message", 1);
+        goto cleanup;
+      }
+      ops[op_num].data.send_message =
+        string_to_byte_buffer(Z_STRVAL_P(message_value),
+                              Z_STRLEN_P(message_value));
+      break;
+    case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+      break;
+    case GRPC_OP_SEND_STATUS_FROM_SERVER:
+      status_hash = HASH_OF(value);
+      if ((inner_value = zend_hash_str_find(status_hash, "metadata",
+                                            sizeof("metadata") - 1))
+          != NULL) {
+        if (!create_metadata_array(inner_value, &trailing_metadata)) {
+          zend_throw_exception(spl_ce_InvalidArgumentException,
+                               "Bad trailing metadata value given", 1);
+          goto cleanup;
         }
-        if (zend_hash_find(status_hash, "code", sizeof("code"),
-                           (void**)&inner_value) == SUCCESS) {
-          if (Z_TYPE_PP(inner_value) != IS_LONG) {
-            zend_throw_exception(spl_ce_InvalidArgumentException,
-                                 "Status code must be an integer",
-                                 1 TSRMLS_CC);
-            goto cleanup;
-          }
-          ops[op_num].data.send_status_from_server.status =
-              Z_LVAL_PP(inner_value);
-        } else {
+        ops[op_num].data.send_status_from_server.trailing_metadata =
+          trailing_metadata.metadata;
+        ops[op_num].data.send_status_from_server.trailing_metadata_count =
+          trailing_metadata.count;
+      }
+      if ((inner_value = zend_hash_str_find(status_hash, "code",
+                                            sizeof("code") - 1)) != NULL) {
+        if (Z_TYPE_P(inner_value) != IS_LONG) {
           zend_throw_exception(spl_ce_InvalidArgumentException,
-                               "Integer status code is required",
-                               1 TSRMLS_CC);
+                               "Status code must be an integer", 1);
           goto cleanup;
         }
-        if (zend_hash_find(status_hash, "details", sizeof("details"),
-                           (void**)&inner_value) == SUCCESS) {
-          if (Z_TYPE_PP(inner_value) != IS_STRING) {
-            zend_throw_exception(spl_ce_InvalidArgumentException,
-                                 "Status details must be a string",
-                                 1 TSRMLS_CC);
-            goto cleanup;
-          }
-          ops[op_num].data.send_status_from_server.status_details =
-              Z_STRVAL_PP(inner_value);
-        } else {
+        ops[op_num].data.send_status_from_server.status =
+          Z_LVAL_P(inner_value);
+      } else {
+        zend_throw_exception(spl_ce_InvalidArgumentException,
+                             "Integer status code is required", 1);
+        goto cleanup;
+      }
+      if ((inner_value = zend_hash_str_find(status_hash, "details",
+                                            sizeof("details") - 1)) != NULL) {
+        if (Z_TYPE_P(inner_value) != IS_STRING) {
           zend_throw_exception(spl_ce_InvalidArgumentException,
-                               "String status details is required",
-                               1 TSRMLS_CC);
+                               "Status details must be a string", 1);
           goto cleanup;
         }
-        break;
-      case GRPC_OP_RECV_INITIAL_METADATA:
-        ops[op_num].data.recv_initial_metadata = &recv_metadata;
-        break;
-      case GRPC_OP_RECV_MESSAGE:
-        ops[op_num].data.recv_message = &message;
-        break;
-      case GRPC_OP_RECV_STATUS_ON_CLIENT:
-        ops[op_num].data.recv_status_on_client.trailing_metadata =
-            &recv_trailing_metadata;
-        ops[op_num].data.recv_status_on_client.status = &status;
-        ops[op_num].data.recv_status_on_client.status_details =
-            &status_details;
-        ops[op_num].data.recv_status_on_client.status_details_capacity =
-            &status_details_capacity;
-        break;
-      case GRPC_OP_RECV_CLOSE_ON_SERVER:
-        ops[op_num].data.recv_close_on_server.cancelled = &cancelled;
-        break;
-      default:
+        ops[op_num].data.send_status_from_server.status_details =
+          Z_STRVAL_P(inner_value);
+      } else {
         zend_throw_exception(spl_ce_InvalidArgumentException,
-                             "Unrecognized key in batch", 1 TSRMLS_CC);
+                             "String status details is required", 1);
         goto cleanup;
+      }
+      break;
+    case GRPC_OP_RECV_INITIAL_METADATA:
+      ops[op_num].data.recv_initial_metadata = &recv_metadata;
+      break;
+    case GRPC_OP_RECV_MESSAGE:
+      ops[op_num].data.recv_message = &message;
+      break;
+    case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      ops[op_num].data.recv_status_on_client.trailing_metadata =
+        &recv_trailing_metadata;
+      ops[op_num].data.recv_status_on_client.status = &status;
+      ops[op_num].data.recv_status_on_client.status_details =
+        &status_details;
+      ops[op_num].data.recv_status_on_client.status_details_capacity =
+        &status_details_capacity;
+      break;
+    case GRPC_OP_RECV_CLOSE_ON_SERVER:
+      ops[op_num].data.recv_close_on_server.cancelled = &cancelled;
+      break;
+    default:
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "Unrecognized key in batch", 1);
+      goto cleanup;
     }
     ops[op_num].op = (grpc_op_type)index;
     ops[op_num].flags = 0;
     ops[op_num].reserved = NULL;
     op_num++;
   }
+  ZEND_HASH_FOREACH_END();
+
+#endif
+
   error = grpc_call_start_batch(call->wrapped, ops, op_num, call->wrapped,
                                 NULL);
   if (error != GRPC_CALL_OK) {
@@ -441,52 +728,98 @@ PHP_METHOD(Call, startBatch) {
   }
   grpc_completion_queue_pluck(completion_queue, call->wrapped,
                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+#if PHP_MAJOR_VERSION < 7
   for (int i = 0; i < op_num; i++) {
     switch(ops[i].op) {
-      case GRPC_OP_SEND_INITIAL_METADATA:
-        add_property_bool(result, "send_metadata", true);
-        break;
-      case GRPC_OP_SEND_MESSAGE:
-        add_property_bool(result, "send_message", true);
-        break;
-      case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
-        add_property_bool(result, "send_close", true);
-        break;
-      case GRPC_OP_SEND_STATUS_FROM_SERVER:
-        add_property_bool(result, "send_status", true);
-        break;
-      case GRPC_OP_RECV_INITIAL_METADATA:
-        array = grpc_parse_metadata_array(&recv_metadata TSRMLS_CC);
-        add_property_zval(result, "metadata", array);
-        Z_DELREF_P(array);
-        break;
-      case GRPC_OP_RECV_MESSAGE:
-        byte_buffer_to_string(message, &message_str, &message_len);
-        if (message_str == NULL) {
-          add_property_null(result, "message");
-        } else {
-          add_property_stringl(result, "message", message_str, message_len,
-                               false);
-        }
-        break;
-      case GRPC_OP_RECV_STATUS_ON_CLIENT:
-        MAKE_STD_ZVAL(recv_status);
-        object_init(recv_status);
-        array = grpc_parse_metadata_array(&recv_trailing_metadata TSRMLS_CC);
-        add_property_zval(recv_status, "metadata", array);
-        Z_DELREF_P(array);
-        add_property_long(recv_status, "code", status);
-        add_property_string(recv_status, "details", status_details, true);
-        add_property_zval(result, "status", recv_status);
-        Z_DELREF_P(recv_status);
-        break;
-      case GRPC_OP_RECV_CLOSE_ON_SERVER:
-        add_property_bool(result, "cancelled", cancelled);
-        break;
-      default:
-        break;
+    case GRPC_OP_SEND_INITIAL_METADATA:
+      add_property_bool(result, "send_metadata", true);
+      break;
+    case GRPC_OP_SEND_MESSAGE:
+      add_property_bool(result, "send_message", true);
+      break;
+    case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+      add_property_bool(result, "send_close", true);
+      break;
+    case GRPC_OP_SEND_STATUS_FROM_SERVER:
+      add_property_bool(result, "send_status", true);
+      break;
+    case GRPC_OP_RECV_INITIAL_METADATA:
+      array = grpc_parse_metadata_array(&recv_metadata TSRMLS_CC);
+      add_property_zval(result, "metadata", array);
+      Z_DELREF_P(array);
+      break;
+    case GRPC_OP_RECV_MESSAGE:
+      byte_buffer_to_string(message, &message_str, &message_len);
+      if (message_str == NULL) {
+        add_property_null(result, "message");
+      } else {
+        add_property_stringl(result, "message", message_str, message_len,
+                             false);
+      }
+      break;
+    case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      MAKE_STD_ZVAL(recv_status);
+      object_init(recv_status);
+      array = grpc_parse_metadata_array(&recv_trailing_metadata TSRMLS_CC);
+      add_property_zval(recv_status, "metadata", array);
+      Z_DELREF_P(array);
+      add_property_long(recv_status, "code", status);
+      add_property_string(recv_status, "details", status_details, true);
+      add_property_zval(result, "status", recv_status);
+      Z_DELREF_P(recv_status);
+      break;
+    case GRPC_OP_RECV_CLOSE_ON_SERVER:
+      add_property_bool(result, "cancelled", cancelled);
+      break;
+    default:
+      break;
+    }
+  }
+#else
+  for (int i = 0; i < op_num; i++) {
+    switch(ops[i].op) {
+    case GRPC_OP_SEND_INITIAL_METADATA:
+      add_property_bool(return_value, "send_metadata", true);
+      break;
+    case GRPC_OP_SEND_MESSAGE:
+      add_property_bool(return_value, "send_message", true);
+      break;
+    case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+      add_property_bool(return_value, "send_close", true);
+      break;
+    case GRPC_OP_SEND_STATUS_FROM_SERVER:
+      add_property_bool(return_value, "send_status", true);
+      break;
+    case GRPC_OP_RECV_INITIAL_METADATA:
+      grpc_parse_metadata_array(&recv_metadata, array);
+      add_property_zval(return_value, "metadata", array);
+      break;
+    case GRPC_OP_RECV_MESSAGE:
+      byte_buffer_to_string(message, &message_str, &message_len);
+      if (message_str == NULL) {
+        add_property_null(return_value, "message");
+      } else {
+        add_property_stringl(return_value, "message", message_str,
+                             message_len);
+      }
+      break;
+    case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      object_init(&recv_status);
+      grpc_parse_metadata_array(&recv_trailing_metadata, array);
+      add_property_zval(&recv_status, "metadata", array);
+      add_property_long(&recv_status, "code", status);
+      add_property_string(&recv_status, "details", status_details);
+      add_property_zval(return_value, "status", &recv_status);
+      break;
+    case GRPC_OP_RECV_CLOSE_ON_SERVER:
+      add_property_bool(return_value, "cancelled", cancelled);
+      break;
+    default:
+      break;
     }
   }
+#endif
+
 cleanup:
   grpc_metadata_array_destroy(&metadata);
   grpc_metadata_array_destroy(&trailing_metadata);
@@ -503,7 +836,11 @@ cleanup:
       grpc_byte_buffer_destroy(message);
     }
   }
+#if PHP_MAJOR_VERSION < 7
   RETURN_DESTROY_ZVAL(result);
+#else
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -511,9 +848,14 @@ cleanup:
  * @return string The URI of the endpoint
  */
 PHP_METHOD(Call, getPeer) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_call *call =
       (wrapped_grpc_call *)zend_object_store_get_object(getThis() TSRMLS_CC);
   RETURN_STRING(grpc_call_get_peer(call->wrapped), 1);
+#else
+  wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(getThis());
+  RETURN_STRING(grpc_call_get_peer(call->wrapped));
+#endif
 }
 
 /**
@@ -521,8 +863,12 @@ PHP_METHOD(Call, getPeer) {
  * has not already ended with another status.
  */
 PHP_METHOD(Call, cancel) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_call *call =
       (wrapped_grpc_call *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(getThis());
+#endif
   grpc_call_cancel(call->wrapped, NULL);
 }
 
@@ -543,12 +889,17 @@ PHP_METHOD(Call, setCredentials) {
     return;
   }
 
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_call_credentials *creds =
       (wrapped_grpc_call_credentials *)zend_object_store_get_object(
           creds_obj TSRMLS_CC);
-
   wrapped_grpc_call *call =
       (wrapped_grpc_call *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  wrapped_grpc_call_credentials *creds =
+    Z_WRAPPED_GRPC_CALL_CREDS_P(creds_obj);
+  wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(getThis());
+#endif
 
   grpc_call_error error = GRPC_CALL_ERROR;
   error = grpc_call_set_credentials(call->wrapped, creds->wrapped);
@@ -556,16 +907,23 @@ PHP_METHOD(Call, setCredentials) {
 }
 
 static zend_function_entry call_methods[] = {
-    PHP_ME(Call, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
-    PHP_ME(Call, startBatch, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Call, getPeer, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Call, cancel, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Call, setCredentials, NULL, ZEND_ACC_PUBLIC)
-    PHP_FE_END};
+  PHP_ME(Call, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
+  PHP_ME(Call, startBatch, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Call, getPeer, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Call, cancel, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Call, setCredentials, NULL, ZEND_ACC_PUBLIC)
+  PHP_FE_END
+};
 
 void grpc_init_call(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\Call", call_methods);
   ce.create_object = create_wrapped_grpc_call;
   grpc_ce_call = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&call_ce_handlers, zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  call_ce_handlers.offset = XtOffsetOf(wrapped_grpc_call, std);
+  call_ce_handlers.free_obj = free_wrapped_grpc_call;
+#endif
 }
diff --git a/src/php/ext/grpc/call.h b/src/php/ext/grpc/call.h
index 36c5f2d272..9fc52d7820 100644
--- a/src/php/ext/grpc/call.h
+++ b/src/php/ext/grpc/call.h
@@ -48,17 +48,15 @@
 /* Class entry for the Call PHP class */
 extern zend_class_entry *grpc_ce_call;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Wrapper struct for grpc_call that can be associated with a PHP object */
 typedef struct wrapped_grpc_call {
   zend_object std;
-
   bool owned;
   grpc_call *wrapped;
 } wrapped_grpc_call;
 
-/* Initializes the Call PHP class */
-void grpc_init_call(TSRMLS_D);
-
 /* Creates a Call object that wraps the given grpc_call struct */
 zval *grpc_php_wrap_call(grpc_call *wrapped, bool owned TSRMLS_DC);
 
@@ -66,6 +64,36 @@ zval *grpc_php_wrap_call(grpc_call *wrapped, bool owned TSRMLS_DC);
  * call metadata */
 zval *grpc_parse_metadata_array(grpc_metadata_array *metadata_array TSRMLS_DC);
 
+#else
+
+/* Wrapper struct for grpc_call that can be associated with a PHP object */
+typedef struct wrapped_grpc_call {
+  bool owned;
+  grpc_call *wrapped;
+  zend_object std;
+} wrapped_grpc_call;
+
+static inline wrapped_grpc_call
+*wrapped_grpc_call_from_obj(zend_object *obj) {
+  return (wrapped_grpc_call*)((char*)(obj) -
+                              XtOffsetOf(wrapped_grpc_call, std));
+}
+
+#define Z_WRAPPED_GRPC_CALL_P(zv) wrapped_grpc_call_from_obj(Z_OBJ_P((zv)))
+
+/* Creates a Call object that wraps the given grpc_call struct */
+void grpc_php_wrap_call(grpc_call *wrapped, bool owned, zval *call_object);
+
+/* Creates and returns a PHP associative array of metadata from a C array of
+ * call metadata */
+void grpc_parse_metadata_array(grpc_metadata_array *metadata_array,
+                               zval *array);
+
+#endif /* PHP_MAJOR_VERSION */
+
+/* Initializes the Call PHP class */
+void grpc_init_call(TSRMLS_D);
+
 /* Populates a grpc_metadata_array with the data in a PHP array object.
    Returns true on success and false on failure */
 bool create_metadata_array(zval *array, grpc_metadata_array *metadata);
diff --git a/src/php/ext/grpc/call_credentials.c b/src/php/ext/grpc/call_credentials.c
index ec0e6b9181..70aaffb848 100644
--- a/src/php/ext/grpc/call_credentials.c
+++ b/src/php/ext/grpc/call_credentials.c
@@ -53,6 +53,8 @@
 
 zend_class_entry *grpc_ce_call_credentials;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instance of wrapped_grpc_call_credentials */
 void free_wrapped_grpc_call_credentials(void *object TSRMLS_DC) {
   wrapped_grpc_call_credentials *creds =
@@ -60,6 +62,7 @@ void free_wrapped_grpc_call_credentials(void *object TSRMLS_DC) {
   if (creds->wrapped != NULL) {
     grpc_call_credentials_release(creds->wrapped);
   }
+  zend_object_std_dtor(&creds->std TSRMLS_CC);
   efree(creds);
 }
 
@@ -94,6 +97,43 @@ zval *grpc_php_wrap_call_credentials(grpc_call_credentials *wrapped TSRMLS_DC) {
   return credentials_object;
 }
 
+#else
+
+static zend_object_handlers call_credentials_ce_handlers;
+
+/* Frees and destroys an instance of wrapped_grpc_call_credentials */
+static void free_wrapped_grpc_call_credentials(zend_object *object) {
+  wrapped_grpc_call_credentials *creds =
+    wrapped_grpc_call_creds_from_obj(object);
+  if (creds->wrapped != NULL) {
+    grpc_call_credentials_release(creds->wrapped);
+  }
+  zend_object_std_dtor(&creds->std);
+}
+
+/* Initializes an instance of wrapped_grpc_call_credentials to be
+ * associated with an object of a class specified by class_type */
+zend_object *create_wrapped_grpc_call_credentials(zend_class_entry
+                                                  *class_type) {
+  wrapped_grpc_call_credentials *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_call_credentials) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &call_credentials_ce_handlers;
+  return &intern->std;
+}
+
+void grpc_php_wrap_call_credentials(grpc_call_credentials *wrapped,
+                                    zval *credentials_object) {
+  object_init_ex(credentials_object, grpc_ce_call_credentials);
+  wrapped_grpc_call_credentials *credentials =
+    Z_WRAPPED_GRPC_CALL_CREDS_P(credentials_object);
+  credentials->wrapped = wrapped;
+}
+
+#endif
+
 /**
  * Create composite credentials from two existing credentials.
  * @param CallCredentials cred1 The first credential
@@ -113,6 +153,7 @@ PHP_METHOD(CallCredentials, createComposite) {
                          1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_call_credentials *cred1 =
       (wrapped_grpc_call_credentials *)zend_object_store_get_object(
           cred1_obj TSRMLS_CC);
@@ -124,6 +165,17 @@ PHP_METHOD(CallCredentials, createComposite) {
                                              NULL);
   zval *creds_object = grpc_php_wrap_call_credentials(creds TSRMLS_CC);
   RETURN_DESTROY_ZVAL(creds_object);
+#else
+  wrapped_grpc_call_credentials *cred1 =
+    Z_WRAPPED_GRPC_CALL_CREDS_P(cred1_obj);
+  wrapped_grpc_call_credentials *cred2 =
+    Z_WRAPPED_GRPC_CALL_CREDS_P(cred2_obj);
+  grpc_call_credentials *creds =
+    grpc_composite_call_credentials_create(cred1->wrapped,
+                                           cred2->wrapped, NULL);
+  grpc_php_wrap_call_credentials(creds, return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -141,13 +193,10 @@ PHP_METHOD(CallCredentials, createFromPlugin) {
   memset(fci_cache, 0, sizeof(zend_fcall_info_cache));
 
   /* "f" == 1 function */
-  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "f", fci,
-                            fci_cache,
-                            fci->params,
-                            fci->param_count) == FAILURE) {
+  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "f*", fci, fci_cache,
+                            fci->params, fci->param_count) == FAILURE) {
     zend_throw_exception(spl_ce_InvalidArgumentException,
-                         "createFromPlugin expects 1 callback",
-                         1 TSRMLS_CC);
+                         "createFromPlugin expects 1 callback", 1 TSRMLS_CC);
     return;
   }
 
@@ -165,10 +214,15 @@ PHP_METHOD(CallCredentials, createFromPlugin) {
   plugin.state = (void *)state;
   plugin.type = "";
 
-  grpc_call_credentials *creds = grpc_metadata_credentials_create_from_plugin(
-      plugin, NULL);
+  grpc_call_credentials *creds =
+    grpc_metadata_credentials_create_from_plugin(plugin, NULL);
+#if PHP_MAJOR_VERSION < 7
   zval *creds_object = grpc_php_wrap_call_credentials(creds TSRMLS_CC);
   RETURN_DESTROY_ZVAL(creds_object);
+#else
+  grpc_php_wrap_call_credentials(creds, return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /* Callback function for plugin creds API */
@@ -181,6 +235,7 @@ void plugin_get_metadata(void *ptr, grpc_auth_metadata_context context,
 
   /* prepare to call the user callback function with info from the
    * grpc_auth_metadata_context */
+#if PHP_MAJOR_VERSION < 7
   zval **params[1];
   zval *arg;
   zval *retval;
@@ -192,21 +247,41 @@ void plugin_get_metadata(void *ptr, grpc_auth_metadata_context context,
   state->fci->param_count = 1;
   state->fci->params = params;
   state->fci->retval_ptr_ptr = &retval;
+#else
+  zval arg;
+  zval retval;
+  object_init(&arg);
+  add_property_string(&arg, "service_url", context.service_url);
+  add_property_string(&arg, "method_name", context.method_name);
+  state->fci->param_count = 1;
+  state->fci->params = &arg;
+  state->fci->retval = &retval;
+#endif
 
   /* call the user callback function */
   zend_call_function(state->fci, state->fci_cache TSRMLS_CC);
 
+#if PHP_MAJOR_VERSION < 7
   if (Z_TYPE_P(retval) != IS_ARRAY) {
+#else
+  if (Z_TYPE_P(&retval) != IS_ARRAY) {
+#endif
     zend_throw_exception(spl_ce_InvalidArgumentException,
                          "plugin callback must return metadata array",
                          1 TSRMLS_CC);
+    return;
   }
 
   grpc_metadata_array metadata;
+#if PHP_MAJOR_VERSION < 7
   if (!create_metadata_array(retval, &metadata)) {
+#else
+  if (!create_metadata_array(&retval, &metadata)) {
+#endif
     zend_throw_exception(spl_ce_InvalidArgumentException,
                          "invalid metadata", 1 TSRMLS_CC);
     grpc_metadata_array_destroy(&metadata);
+    return;
   }
 
   /* TODO: handle error */
@@ -229,11 +304,21 @@ static zend_function_entry call_credentials_methods[] = {
          ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
   PHP_ME(CallCredentials, createFromPlugin, NULL,
          ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-  PHP_FE_END};
+  PHP_FE_END
+};
 
 void grpc_init_call_credentials(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\CallCredentials", call_credentials_methods);
   ce.create_object = create_wrapped_grpc_call_credentials;
   grpc_ce_call_credentials = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&call_credentials_ce_handlers,
+         zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  call_credentials_ce_handlers.offset =
+    XtOffsetOf(wrapped_grpc_call_credentials, std);
+  call_credentials_ce_handlers.free_obj =
+    free_wrapped_grpc_call_credentials;
+#endif
 }
diff --git a/src/php/ext/grpc/call_credentials.h b/src/php/ext/grpc/call_credentials.h
index d2f6a92449..e05e14698b 100755
--- a/src/php/ext/grpc/call_credentials.h
+++ b/src/php/ext/grpc/call_credentials.h
@@ -49,14 +49,37 @@
 /* Class entry for the CallCredentials PHP class */
 extern zend_class_entry *grpc_ce_call_credentials;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Wrapper struct for grpc_call_credentials that can be associated
  * with a PHP object */
 typedef struct wrapped_grpc_call_credentials {
   zend_object std;
+  grpc_call_credentials *wrapped;
+} wrapped_grpc_call_credentials;
 
+#else
+
+/* Wrapper struct for grpc_call_credentials that can be associated
+ * with a PHP object */
+typedef struct wrapped_grpc_call_credentials {
   grpc_call_credentials *wrapped;
+  zend_object std;
 } wrapped_grpc_call_credentials;
 
+static inline wrapped_grpc_call_credentials
+*wrapped_grpc_call_creds_from_obj(zend_object *obj) {
+  return
+    (wrapped_grpc_call_credentials*)((char*)(obj) -
+                                     XtOffsetOf(wrapped_grpc_call_credentials,
+                                                std));
+}
+
+#define Z_WRAPPED_GRPC_CALL_CREDS_P(zv)           \
+  wrapped_grpc_call_creds_from_obj(Z_OBJ_P((zv)))
+
+#endif /* PHP_MAJOR_VERSION */
+
 /* Struct to hold callback function for plugin creds API */
 typedef struct plugin_state {
   zend_fcall_info *fci;
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index 8d94c59683..6737e340f9 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -57,12 +57,15 @@
 
 zend_class_entry *grpc_ce_channel;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instance of wrapped_grpc_channel */
 void free_wrapped_grpc_channel(void *object TSRMLS_DC) {
   wrapped_grpc_channel *channel = (wrapped_grpc_channel *)object;
   if (channel->wrapped != NULL) {
     grpc_channel_destroy(channel->wrapped);
   }
+  zend_object_std_dtor(&channel->std TSRMLS_CC);
   efree(channel);
 }
 
@@ -83,7 +86,8 @@ zend_object_value create_wrapped_grpc_channel(zend_class_entry *class_type
   return retval;
 }
 
-void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args TSRMLS_DC) {
+void php_grpc_read_args_array(zval *args_array,
+                              grpc_channel_args *args TSRMLS_DC) {
   HashTable *array_hash;
   HashPosition array_pointer;
   int args_index;
@@ -107,23 +111,88 @@ void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args TSRMLS_D
     }
     args->args[args_index].key = key;
     switch (Z_TYPE_P(*data)) {
-      case IS_LONG:
-        args->args[args_index].value.integer = (int)Z_LVAL_P(*data);
-        args->args[args_index].type = GRPC_ARG_INTEGER;
-        break;
-      case IS_STRING:
-        args->args[args_index].value.string = Z_STRVAL_P(*data);
-        args->args[args_index].type = GRPC_ARG_STRING;
-        break;
-      default:
-        zend_throw_exception(spl_ce_InvalidArgumentException,
-                             "args values must be int or string", 1 TSRMLS_CC);
-        return;
+    case IS_LONG:
+      args->args[args_index].value.integer = (int)Z_LVAL_P(*data);
+      args->args[args_index].type = GRPC_ARG_INTEGER;
+      break;
+    case IS_STRING:
+      args->args[args_index].value.string = Z_STRVAL_P(*data);
+      args->args[args_index].type = GRPC_ARG_STRING;
+      break;
+    default:
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "args values must be int or string", 1 TSRMLS_CC);
+      return;
     }
     args_index++;
   }
 }
 
+#else
+
+static zend_object_handlers channel_ce_handlers;
+
+/* Frees and destroys an instance of wrapped_grpc_channel */
+static void free_wrapped_grpc_channel(zend_object *object) {
+  wrapped_grpc_channel *channel = wrapped_grpc_channel_from_obj(object);
+  if (channel->wrapped != NULL) {
+    grpc_channel_destroy(channel->wrapped);
+  }
+  zend_object_std_dtor(&channel->std);
+}
+
+/* Initializes an instance of wrapped_grpc_channel to be associated with an
+ * object of a class specified by class_type */
+zend_object *create_wrapped_grpc_channel(zend_class_entry *class_type) {
+  wrapped_grpc_channel *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_channel) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &channel_ce_handlers;
+  return &intern->std;
+}
+
+void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args) {
+  HashTable *array_hash;
+  int args_index;
+  zval *data;
+  zend_string *key;
+  array_hash = HASH_OF(args_array);
+  if (!array_hash) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "array_hash is NULL", 1);
+    return;
+  }
+  args->num_args = zend_hash_num_elements(array_hash);
+  args->args = ecalloc(args->num_args, sizeof(grpc_arg));
+  args_index = 0;
+  ZEND_HASH_FOREACH_STR_KEY_VAL(array_hash, key, data) {
+    if (key == NULL) {
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "args keys must be strings", 1);
+    }
+    args->args[args_index].key = ZSTR_VAL(key);
+    switch (Z_TYPE_P(data)) {
+    case IS_LONG:
+      args->args[args_index].value.integer = (int)Z_LVAL_P(data);
+      args->args[args_index].type = GRPC_ARG_INTEGER;
+      break;
+    case IS_STRING:
+      args->args[args_index].value.string = Z_STRVAL_P(data);
+      args->args[args_index].type = GRPC_ARG_STRING;
+      break;
+    default:
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "args values must be int or string", 1);
+      return;
+    }
+    args_index++;
+  } ZEND_HASH_FOREACH_END();
+}
+
+#endif
+
 /**
  * Construct an instance of the Channel class. If the $args array contains a
  * "credentials" key mapping to a ChannelCredentials object, a secure channel
@@ -132,16 +201,23 @@ void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args TSRMLS_D
  * @param array $args The arguments to pass to the Channel (optional)
  */
 PHP_METHOD(Channel, __construct) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_channel *channel =
       (wrapped_grpc_channel *)zend_object_store_get_object(
           getThis() TSRMLS_CC);
-  char *target;
+  zval **creds_obj = NULL;
   int target_length;
+#else
+  wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
+  zval *creds_obj = NULL;
+  size_t target_length;
+#endif
+  char *target;
   zval *args_array = NULL;
   grpc_channel_args args;
   HashTable *array_hash;
-  zval **creds_obj = NULL;
   wrapped_grpc_channel_credentials *creds = NULL;
+
   /* "sa" == 1 string, 1 array */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa", &target,
                             &target_length, &args_array) == FAILURE) {
@@ -149,6 +225,7 @@ PHP_METHOD(Channel, __construct) {
                          "Channel expects a string and an array", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   array_hash = Z_ARRVAL_P(args_array);
   if (zend_hash_find(array_hash, "credentials", sizeof("credentials"),
                      (void **)&creds_obj) == SUCCESS) {
@@ -167,6 +244,24 @@ PHP_METHOD(Channel, __construct) {
       zend_hash_del(array_hash, "credentials", 12);
     }
   }
+#else
+  array_hash = HASH_OF(args_array);
+  if ((creds_obj = zend_hash_str_find(array_hash, "credentials",
+                                      sizeof("credentials") - 1)) != NULL) {
+    if (Z_TYPE_P(creds_obj) == IS_NULL) {
+      creds = NULL;
+      zend_hash_str_del(array_hash, "credentials", sizeof("credentials") - 1);
+    } else if (Z_OBJ_P(creds_obj)->ce != grpc_ce_channel_credentials) {
+      zend_throw_exception(spl_ce_InvalidArgumentException,
+                           "credentials must be a ChannelCredentials object",
+                           1);
+      return;
+    } else {
+      creds = Z_WRAPPED_GRPC_CHANNEL_CREDS_P(creds_obj);
+      zend_hash_str_del(array_hash, "credentials", sizeof("credentials") - 1);
+    }
+  }
+#endif
   php_grpc_read_args_array(args_array, &args TSRMLS_CC);
   if (creds == NULL) {
     channel->wrapped = grpc_insecure_channel_create(target, &args, NULL);
@@ -182,9 +277,14 @@ PHP_METHOD(Channel, __construct) {
  * @return string The URI of the endpoint
  */
 PHP_METHOD(Channel, getTarget) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_channel *channel =
-      (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
+    (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
   RETURN_STRING(grpc_channel_get_target(channel->wrapped), 1);
+#else
+  wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
+  RETURN_STRING(grpc_channel_get_target(channel->wrapped));
+#endif
 }
 
 /**
@@ -193,12 +293,17 @@ PHP_METHOD(Channel, getTarget) {
  * @return long The grpc connectivity state
  */
 PHP_METHOD(Channel, getConnectivityState) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_channel *channel =
       (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
-  bool try_to_connect;
+#else
+  wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
+#endif
+  bool try_to_connect = false;
+
   /* "|b" == 1 optional bool */
-  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|b", &try_to_connect) ==
-      FAILURE) {
+  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|b", &try_to_connect)
+      == FAILURE) {
     zend_throw_exception(spl_ce_InvalidArgumentException,
                          "getConnectivityState expects a bool", 1 TSRMLS_CC);
     return;
@@ -215,10 +320,16 @@ PHP_METHOD(Channel, getConnectivityState) {
  *              before deadline
  */
 PHP_METHOD(Channel, watchConnectivityState) {
+#if PHP_MAJOR_VERSION < 7
+  long last_state;
   wrapped_grpc_channel *channel =
       (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
-  long last_state;
+#else
+  zend_long last_state;
+  wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
+#endif
   zval *deadline_obj;
+
   /* "lO" == 1 long 1 object */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "lO",
           &last_state, &deadline_obj, grpc_ce_timeval) == FAILURE) {
@@ -228,15 +339,20 @@ PHP_METHOD(Channel, watchConnectivityState) {
     return;
   }
 
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *deadline =
       (wrapped_grpc_timeval *)zend_object_store_get_object(
           deadline_obj TSRMLS_CC);
-  grpc_channel_watch_connectivity_state(
-      channel->wrapped, (grpc_connectivity_state)last_state,
-      deadline->wrapped, completion_queue, NULL);
-  grpc_event event = grpc_completion_queue_pluck(
-      completion_queue, NULL,
-      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+#else
+  wrapped_grpc_timeval *deadline = Z_WRAPPED_GRPC_TIMEVAL_P(deadline_obj);
+#endif
+  grpc_channel_watch_connectivity_state(channel->wrapped,
+                                        (grpc_connectivity_state)last_state,
+                                        deadline->wrapped, completion_queue,
+                                        NULL);
+  grpc_event event =
+    grpc_completion_queue_pluck(completion_queue, NULL,
+                                gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   RETURN_BOOL(event.success);
 }
 
@@ -244,8 +360,12 @@ PHP_METHOD(Channel, watchConnectivityState) {
  * Close the channel
  */
 PHP_METHOD(Channel, close) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_channel *channel =
-      (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
+    (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
+#endif
   if (channel->wrapped != NULL) {
     grpc_channel_destroy(channel->wrapped);
     channel->wrapped = NULL;
@@ -253,16 +373,24 @@ PHP_METHOD(Channel, close) {
 }
 
 static zend_function_entry channel_methods[] = {
-    PHP_ME(Channel, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
-    PHP_ME(Channel, getTarget, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Channel, getConnectivityState, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Channel, watchConnectivityState, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Channel, close, NULL, ZEND_ACC_PUBLIC)
-    PHP_FE_END};
+  PHP_ME(Channel, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
+  PHP_ME(Channel, getTarget, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Channel, getConnectivityState, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Channel, watchConnectivityState, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Channel, close, NULL, ZEND_ACC_PUBLIC)
+  PHP_FE_END
+};
 
 void grpc_init_channel(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\Channel", channel_methods);
   ce.create_object = create_wrapped_grpc_channel;
   grpc_ce_channel = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&channel_ce_handlers, zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  channel_ce_handlers.offset =
+    XtOffsetOf(wrapped_grpc_channel, std);
+  channel_ce_handlers.free_obj = free_wrapped_grpc_channel;
+#endif
 }
diff --git a/src/php/ext/grpc/channel.h b/src/php/ext/grpc/channel.h
index cc5823ee7f..ea5efeaf86 100755
--- a/src/php/ext/grpc/channel.h
+++ b/src/php/ext/grpc/channel.h
@@ -48,17 +48,38 @@
 /* Class entry for the PHP Channel class */
 extern zend_class_entry *grpc_ce_channel;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Wrapper struct for grpc_channel that can be associated with a PHP object */
 typedef struct wrapped_grpc_channel {
   zend_object std;
+  grpc_channel *wrapped;
+} wrapped_grpc_channel;
 
+#else
+
+/* Wrapper struct for grpc_channel that can be associated with a PHP object */
+typedef struct wrapped_grpc_channel {
   grpc_channel *wrapped;
+  zend_object std;
 } wrapped_grpc_channel;
 
+static inline wrapped_grpc_channel
+*wrapped_grpc_channel_from_obj(zend_object *obj) {
+  return (wrapped_grpc_channel*)((char*)(obj) -
+                                 XtOffsetOf(wrapped_grpc_channel, std));
+}
+
+#define Z_WRAPPED_GRPC_CHANNEL_P(zv)            \
+  wrapped_grpc_channel_from_obj(Z_OBJ_P((zv)))
+
+#endif /* PHP_MAJOR_VERSION */
+
 /* Initializes the Channel class */
 void grpc_init_channel(TSRMLS_D);
 
 /* Iterates through a PHP array and populates args with the contents */
-void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args TSRMLS_DC);
+void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args
+                              TSRMLS_DC);
 
 #endif /* NET_GRPC_PHP_GRPC_CHANNEL_H_ */
diff --git a/src/php/ext/grpc/channel_credentials.c b/src/php/ext/grpc/channel_credentials.c
index b76fb105f3..16ba0368eb 100644
--- a/src/php/ext/grpc/channel_credentials.c
+++ b/src/php/ext/grpc/channel_credentials.c
@@ -52,7 +52,6 @@
 #include <grpc/grpc_security.h>
 
 zend_class_entry *grpc_ce_channel_credentials;
-
 static char *default_pem_root_certs = NULL;
 
 static grpc_ssl_roots_override_result get_ssl_roots_override(
@@ -64,6 +63,8 @@ static grpc_ssl_roots_override_result get_ssl_roots_override(
   return GRPC_SSL_ROOTS_OVERRIDE_OK;
 }
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instance of wrapped_grpc_channel_credentials */
 void free_wrapped_grpc_channel_credentials(void *object TSRMLS_DC) {
   wrapped_grpc_channel_credentials *creds =
@@ -71,6 +72,7 @@ void free_wrapped_grpc_channel_credentials(void *object TSRMLS_DC) {
   if (creds->wrapped != NULL) {
     grpc_channel_credentials_release(creds->wrapped);
   }
+  zend_object_std_dtor(&creds->std TSRMLS_CC);
   efree(creds);
 }
 
@@ -94,7 +96,8 @@ zend_object_value create_wrapped_grpc_channel_credentials(
   return retval;
 }
 
-zval *grpc_php_wrap_channel_credentials(grpc_channel_credentials *wrapped TSRMLS_DC) {
+zval *grpc_php_wrap_channel_credentials(grpc_channel_credentials
+                                        *wrapped TSRMLS_DC) {
   zval *credentials_object;
   MAKE_STD_ZVAL(credentials_object);
   object_init_ex(credentials_object, grpc_ce_channel_credentials);
@@ -105,6 +108,43 @@ zval *grpc_php_wrap_channel_credentials(grpc_channel_credentials *wrapped TSRMLS
   return credentials_object;
 }
 
+#else
+
+static zend_object_handlers channel_credentials_ce_handlers;
+
+/* Frees and destroys an instance of wrapped_grpc_channel_credentials */
+static void free_wrapped_grpc_channel_credentials(zend_object *object) {
+  wrapped_grpc_channel_credentials *creds =
+    wrapped_grpc_channel_creds_from_obj(object);
+  if (creds->wrapped != NULL) {
+    grpc_channel_credentials_release(creds->wrapped);
+  }
+  zend_object_std_dtor(&creds->std);
+}
+
+/* Initializes an instance of wrapped_grpc_channel_credentials to be
+ * associated with an object of a class specified by class_type */
+zend_object *create_wrapped_grpc_channel_credentials(zend_class_entry
+                                                     *class_type) {
+  wrapped_grpc_channel_credentials *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_channel_credentials) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &channel_credentials_ce_handlers;
+  return &intern->std;
+}
+
+void grpc_php_wrap_channel_credentials(grpc_channel_credentials *wrapped,
+                                       zval *credentials_object) {
+  object_init_ex(credentials_object, grpc_ce_channel_credentials);
+  wrapped_grpc_channel_credentials *credentials =
+    Z_WRAPPED_GRPC_CHANNEL_CREDS_P(credentials_object);
+  credentials->wrapped = wrapped;
+}
+
+#endif
+
 /**
  * Set default roots pem.
  * @param string pem_roots PEM encoding of the server root certificates
@@ -112,7 +152,13 @@ zval *grpc_php_wrap_channel_credentials(grpc_channel_credentials *wrapped TSRMLS
  */
 PHP_METHOD(ChannelCredentials, setDefaultRootsPem) {
   char *pem_roots;
+#if PHP_MAJOR_VERSION < 7
   int pem_roots_length;
+#else
+  size_t pem_roots_length;
+#endif
+
+  /* "s" == 1 string */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &pem_roots,
                             &pem_roots_length) == FAILURE) {
     zend_throw_exception(spl_ce_InvalidArgumentException,
@@ -129,8 +175,13 @@ PHP_METHOD(ChannelCredentials, setDefaultRootsPem) {
  */
 PHP_METHOD(ChannelCredentials, createDefault) {
   grpc_channel_credentials *creds = grpc_google_default_credentials_create();
+#if PHP_MAJOR_VERSION < 7
   zval *creds_object = grpc_php_wrap_channel_credentials(creds TSRMLS_CC);
   RETURN_DESTROY_ZVAL(creds_object);
+#else
+  grpc_php_wrap_channel_credentials(creds, return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -146,11 +197,15 @@ PHP_METHOD(ChannelCredentials, createSsl) {
   char *pem_root_certs = NULL;
   grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
 
+#if PHP_MAJOR_VERSION < 7
   int root_certs_length = 0, private_key_length = 0, cert_chain_length = 0;
+#else
+  size_t root_certs_length = 0, private_key_length = 0, cert_chain_length = 0;
+#endif
 
   pem_key_cert_pair.private_key = pem_key_cert_pair.cert_chain = NULL;
 
-  /* "|s!s!s! == 3 optional nullable strings */
+  /* "|s!s!s!" == 3 optional nullable strings */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!s!s!",
                             &pem_root_certs, &root_certs_length,
                             &pem_key_cert_pair.private_key,
@@ -164,8 +219,13 @@ PHP_METHOD(ChannelCredentials, createSsl) {
   grpc_channel_credentials *creds = grpc_ssl_credentials_create(
       pem_root_certs,
       pem_key_cert_pair.private_key == NULL ? NULL : &pem_key_cert_pair, NULL);
+#if PHP_MAJOR_VERSION < 7
   zval *creds_object = grpc_php_wrap_channel_credentials(creds TSRMLS_CC);
   RETURN_DESTROY_ZVAL(creds_object);
+#else
+  grpc_php_wrap_channel_credentials(creds, return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -178,7 +238,7 @@ PHP_METHOD(ChannelCredentials, createComposite) {
   zval *cred1_obj;
   zval *cred2_obj;
 
-  /* "OO" == 3 Objects */
+  /* "OO" == 2 Objects */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OO", &cred1_obj,
                             grpc_ce_channel_credentials, &cred2_obj,
                             grpc_ce_call_credentials) == FAILURE) {
@@ -186,6 +246,7 @@ PHP_METHOD(ChannelCredentials, createComposite) {
                          "createComposite expects 2 Credentials", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_channel_credentials *cred1 =
       (wrapped_grpc_channel_credentials *)zend_object_store_get_object(
           cred1_obj TSRMLS_CC);
@@ -197,6 +258,17 @@ PHP_METHOD(ChannelCredentials, createComposite) {
                                                 NULL);
   zval *creds_object = grpc_php_wrap_channel_credentials(creds TSRMLS_CC);
   RETURN_DESTROY_ZVAL(creds_object);
+#else
+  wrapped_grpc_channel_credentials *cred1 =
+    Z_WRAPPED_GRPC_CHANNEL_CREDS_P(cred1_obj);
+  wrapped_grpc_call_credentials *cred2 =
+    Z_WRAPPED_GRPC_CALL_CREDS_P(cred2_obj);
+  grpc_channel_credentials *creds =
+    grpc_composite_channel_credentials_create(cred1->wrapped,
+                                              cred2->wrapped, NULL);
+  grpc_php_wrap_channel_credentials(creds, return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -218,7 +290,8 @@ static zend_function_entry channel_credentials_methods[] = {
          ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
   PHP_ME(ChannelCredentials, createInsecure, NULL,
          ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-  PHP_FE_END};
+  PHP_FE_END
+};
 
 void grpc_init_channel_credentials(TSRMLS_D) {
   zend_class_entry ce;
@@ -227,4 +300,13 @@ void grpc_init_channel_credentials(TSRMLS_D) {
   grpc_set_ssl_roots_override_callback(get_ssl_roots_override);
   ce.create_object = create_wrapped_grpc_channel_credentials;
   grpc_ce_channel_credentials = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&channel_credentials_ce_handlers,
+         zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  channel_credentials_ce_handlers.offset =
+    XtOffsetOf(wrapped_grpc_channel_credentials, std);
+  channel_credentials_ce_handlers.free_obj =
+    free_wrapped_grpc_channel_credentials;
+#endif
 }
diff --git a/src/php/ext/grpc/channel_credentials.h b/src/php/ext/grpc/channel_credentials.h
index d89984ce60..44071b10f1 100755
--- a/src/php/ext/grpc/channel_credentials.h
+++ b/src/php/ext/grpc/channel_credentials.h
@@ -49,14 +49,37 @@
 /* Class entry for the ChannelCredentials PHP class */
 extern zend_class_entry *grpc_ce_channel_credentials;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Wrapper struct for grpc_channel_credentials that can be associated
  * with a PHP object */
 typedef struct wrapped_grpc_channel_credentials {
   zend_object std;
+  grpc_channel_credentials *wrapped;
+} wrapped_grpc_channel_credentials;
 
+#else
+
+/* Wrapper struct for grpc_channel_credentials that can be associated
+ * with a PHP object */
+typedef struct wrapped_grpc_channel_credentials {
   grpc_channel_credentials *wrapped;
+  zend_object std;
 } wrapped_grpc_channel_credentials;
 
+static inline wrapped_grpc_channel_credentials
+*wrapped_grpc_channel_creds_from_obj(zend_object *obj) {
+  return
+    (wrapped_grpc_channel_credentials *)
+    ((char*)(obj) -
+     XtOffsetOf(wrapped_grpc_channel_credentials, std));
+}
+
+#define Z_WRAPPED_GRPC_CHANNEL_CREDS_P(zv)            \
+  wrapped_grpc_channel_creds_from_obj(Z_OBJ_P((zv)))
+
+#endif /* PHP_MAJOR_VERSION */
+
 /* Initializes the ChannelCredentials PHP class */
 void grpc_init_channel_credentials(TSRMLS_D);
 
diff --git a/src/php/ext/grpc/php_grpc.c b/src/php/ext/grpc/php_grpc.c
index 449ba3cd47..5edfa2da7d 100644
--- a/src/php/ext/grpc/php_grpc.c
+++ b/src/php/ext/grpc/php_grpc.c
@@ -64,15 +64,19 @@ const zend_function_entry grpc_functions[] = {
  */
 zend_module_entry grpc_module_entry = {
 #if ZEND_MODULE_API_NO >= 20010901
-    STANDARD_MODULE_HEADER,
+  STANDARD_MODULE_HEADER,
 #endif
-    "grpc",                    grpc_functions, PHP_MINIT(grpc),
-    PHP_MSHUTDOWN(grpc),       NULL,           NULL,
-    PHP_MINFO(grpc),
+  "grpc",
+  grpc_functions,
+  PHP_MINIT(grpc),
+  PHP_MSHUTDOWN(grpc),
+  NULL,
+  NULL,
+  PHP_MINFO(grpc),
 #if ZEND_MODULE_API_NO >= 20010901
-    PHP_GRPC_VERSION,
+  PHP_GRPC_VERSION,
 #endif
-    STANDARD_MODULE_PROPERTIES};
+  STANDARD_MODULE_PROPERTIES};
 /* }}} */
 
 #ifdef COMPILE_DL_GRPC
@@ -82,23 +86,24 @@ ZEND_GET_MODULE(grpc)
 /* {{{ PHP_INI
  */
 /* Remove comments and fill if you need to have entries in php.ini
-PHP_INI_BEGIN()
-    STD_PHP_INI_ENTRY("grpc.global_value",      "42", PHP_INI_ALL, OnUpdateLong,
-global_value, zend_grpc_globals, grpc_globals)
-    STD_PHP_INI_ENTRY("grpc.global_string", "foobar", PHP_INI_ALL,
-OnUpdateString, global_string, zend_grpc_globals, grpc_globals)
-PHP_INI_END()
+   PHP_INI_BEGIN()
+   STD_PHP_INI_ENTRY("grpc.global_value", "42", PHP_INI_ALL, OnUpdateLong,
+                     global_value, zend_grpc_globals, grpc_globals)
+   STD_PHP_INI_ENTRY("grpc.global_string", "foobar", PHP_INI_ALL,
+                     OnUpdateString, global_string, zend_grpc_globals,
+                     grpc_globals)
+   PHP_INI_END()
 */
 /* }}} */
 
 /* {{{ php_grpc_init_globals
  */
 /* Uncomment this function if you have INI entries
-static void php_grpc_init_globals(zend_grpc_globals *grpc_globals)
-{
-    grpc_globals->global_value = 0;
-    grpc_globals->global_string = NULL;
-}
+   static void php_grpc_init_globals(zend_grpc_globals *grpc_globals)
+   {
+     grpc_globals->global_value = 0;
+     grpc_globals->global_string = NULL;
+   }
 */
 /* }}} */
 
@@ -106,7 +111,7 @@ static void php_grpc_init_globals(zend_grpc_globals *grpc_globals)
  */
 PHP_MINIT_FUNCTION(grpc) {
   /* If you have INI entries, uncomment these lines
-  REGISTER_INI_ENTRIES();
+     REGISTER_INI_ENTRIES();
   */
   /* Register call error constants */
   grpc_init();
@@ -246,7 +251,7 @@ PHP_MINIT_FUNCTION(grpc) {
  */
 PHP_MSHUTDOWN_FUNCTION(grpc) {
   /* uncomment this line if you have INI entries
-  UNREGISTER_INI_ENTRIES();
+     UNREGISTER_INI_ENTRIES();
   */
   // WARNING: This function IS being called by PHP when the extension
   // is unloaded but the logs were somehow suppressed.
@@ -265,7 +270,7 @@ PHP_MINFO_FUNCTION(grpc) {
   php_info_print_table_end();
 
   /* Remove comments if you have entries in php.ini
-  DISPLAY_INI_ENTRIES();
+     DISPLAY_INI_ENTRIES();
   */
 }
 /* }}} */
@@ -274,12 +279,3 @@ PHP_MINFO_FUNCTION(grpc) {
    function definition, where the functions purpose is also documented. Please
    follow this convention for the convenience of others editing your code.
 */
-
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- * vim600: noet sw=4 ts=4 fdm=marker
- * vim<600: noet sw=4 ts=4
- */
diff --git a/src/php/ext/grpc/php_grpc.h b/src/php/ext/grpc/php_grpc.h
index 1d4834c50f..bd7ee75a6f 100644
--- a/src/php/ext/grpc/php_grpc.h
+++ b/src/php/ext/grpc/php_grpc.h
@@ -72,8 +72,8 @@ PHP_MSHUTDOWN_FUNCTION(grpc);
 PHP_MINFO_FUNCTION(grpc);
 
 /*
-        Declare any global variables you may need between the BEGIN
-        and END macros here:
+  Declare any global variables you may need between the BEGIN
+  and END macros here:
 
 ZEND_BEGIN_MODULE_GLOBALS(grpc)
 ZEND_END_MODULE_GLOBALS(grpc)
diff --git a/src/php/ext/grpc/server.c b/src/php/ext/grpc/server.c
index c13e7cd1f9..50fb2d0cf9 100644
--- a/src/php/ext/grpc/server.c
+++ b/src/php/ext/grpc/server.c
@@ -58,6 +58,8 @@
 
 zend_class_entry *grpc_ce_server;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instance of wrapped_grpc_server */
 void free_wrapped_grpc_server(void *object TSRMLS_DC) {
   wrapped_grpc_server *server = (wrapped_grpc_server *)object;
@@ -68,6 +70,7 @@ void free_wrapped_grpc_server(void *object TSRMLS_DC) {
                                 gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
     grpc_server_destroy(server->wrapped);
   }
+  zend_object_std_dtor(&server->std TSRMLS_CC);
   efree(server);
 }
 
@@ -90,15 +93,51 @@ zend_object_value create_wrapped_grpc_server(zend_class_entry *class_type
   return retval;
 }
 
+#else
+
+static zend_object_handlers server_ce_handlers;
+
+/* Frees and destroys an instance of wrapped_grpc_server */
+static void free_wrapped_grpc_server(zend_object *object) {
+  wrapped_grpc_server *server = wrapped_grpc_server_from_obj(object);
+  if (server->wrapped != NULL) {
+    grpc_server_shutdown_and_notify(server->wrapped, completion_queue, NULL);
+    grpc_server_cancel_all_calls(server->wrapped);
+    grpc_completion_queue_pluck(completion_queue, NULL,
+                                gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+    grpc_server_destroy(server->wrapped);
+  }
+  zend_object_std_dtor(&server->std);
+}
+
+/* Initializes an instance of wrapped_grpc_call to be associated with an object
+ * of a class specified by class_type */
+zend_object *create_wrapped_grpc_server(zend_class_entry *class_type) {
+  wrapped_grpc_server *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_server) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &server_ce_handlers;
+  return &intern->std;
+}
+
+#endif
+
 /**
  * Constructs a new instance of the Server class
  * @param array $args The arguments to pass to the server (optional)
  */
 PHP_METHOD(Server, __construct) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_server *server =
       (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
+#endif
   zval *args_array = NULL;
   grpc_channel_args args;
+
   /* "|a" == 1 optional array */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|a", &args_array) ==
       FAILURE) {
@@ -110,6 +149,8 @@ PHP_METHOD(Server, __construct) {
   if (args_array == NULL) {
     server->wrapped = grpc_server_create(NULL, NULL);
   } else {
+    //TODO(thinkerou): deal it if key of array is long, crash now on php7
+    // and update unit test case
     php_grpc_read_args_array(args_array, &args TSRMLS_CC);
     server->wrapped = grpc_server_create(&args, NULL);
     efree(args.args);
@@ -126,15 +167,22 @@ PHP_METHOD(Server, __construct) {
  */
 PHP_METHOD(Server, requestCall) {
   grpc_call_error error_code;
-  wrapped_grpc_server *server =
-      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
   grpc_call *call;
   grpc_call_details details;
   grpc_metadata_array metadata;
-  zval *result;
   grpc_event event;
+
+#if PHP_MAJOR_VERSION < 7
+  wrapped_grpc_server *server =
+      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
+  zval *result;
   MAKE_STD_ZVAL(result);
   object_init(result);
+#else
+  wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
+  object_init(return_value);
+#endif
+
   grpc_call_details_init(&details);
   grpc_metadata_array_init(&metadata);
   error_code =
@@ -146,23 +194,48 @@ PHP_METHOD(Server, requestCall) {
     goto cleanup;
   }
   event = grpc_completion_queue_pluck(completion_queue, NULL,
-                                      gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+                                      gpr_inf_future(GPR_CLOCK_REALTIME),
+                                      NULL);
   if (!event.success) {
     zend_throw_exception(spl_ce_LogicException,
                          "Failed to request a call for some reason",
                          1 TSRMLS_CC);
     goto cleanup;
   }
+#if PHP_MAJOR_VERSION < 7
   add_property_zval(result, "call", grpc_php_wrap_call(call, true TSRMLS_CC));
   add_property_string(result, "method", details.method, true);
   add_property_string(result, "host", details.host, true);
   add_property_zval(result, "absolute_deadline",
                     grpc_php_wrap_timeval(details.deadline TSRMLS_CC));
-  add_property_zval(result, "metadata", grpc_parse_metadata_array(&metadata TSRMLS_CC));
+  add_property_zval(result, "metadata", grpc_parse_metadata_array(&metadata
+                                                                  TSRMLS_CC));
+ 
 cleanup:
   grpc_call_details_destroy(&details);
   grpc_metadata_array_destroy(&metadata);
   RETURN_DESTROY_ZVAL(result);
+
+#else
+
+  zval zv_call;
+  zval zv_timeval;
+  zval zv_md;
+  grpc_php_wrap_call(call, true, &zv_call);
+  grpc_php_wrap_timeval(details.deadline, &zv_timeval);
+  grpc_parse_metadata_array(&metadata, &zv_md);
+
+  add_property_zval(return_value, "call", &zv_call);
+  add_property_string(return_value, "method", details.method);
+  add_property_string(return_value, "host", details.host);
+  add_property_zval(return_value, "absolute_deadline", &zv_timeval);
+  add_property_zval(return_value, "metadata", &zv_md);
+
+ cleanup:
+  grpc_call_details_destroy(&details);
+  grpc_metadata_array_destroy(&metadata);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -171,13 +244,19 @@ cleanup:
  * @return true on success, false on failure
  */
 PHP_METHOD(Server, addHttp2Port) {
-  wrapped_grpc_server *server =
-      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
   const char *addr;
+#if PHP_MAJOR_VERSION < 7
   int addr_len;
+  wrapped_grpc_server *server =
+      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  size_t addr_len;
+  wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
+#endif
+
   /* "s" == 1 string */
-  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &addr, &addr_len) ==
-      FAILURE) {
+  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &addr, &addr_len)
+      == FAILURE) {
     zend_throw_exception(spl_ce_InvalidArgumentException,
                          "add_http2_port expects a string", 1 TSRMLS_CC);
     return;
@@ -186,11 +265,17 @@ PHP_METHOD(Server, addHttp2Port) {
 }
 
 PHP_METHOD(Server, addSecureHttp2Port) {
-  wrapped_grpc_server *server =
-      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
   const char *addr;
-  int addr_len;
   zval *creds_obj;
+#if PHP_MAJOR_VERSION < 7
+  int addr_len;
+  wrapped_grpc_server *server =
+      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  size_t addr_len;
+  wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
+#endif
+
   /* "sO" == 1 string, 1 object */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sO", &addr, &addr_len,
                             &creds_obj, grpc_ce_server_credentials) ==
@@ -200,9 +285,14 @@ PHP_METHOD(Server, addSecureHttp2Port) {
         "add_http2_port expects a string and a ServerCredentials", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_server_credentials *creds =
       (wrapped_grpc_server_credentials *)zend_object_store_get_object(
           creds_obj TSRMLS_CC);
+#else
+  wrapped_grpc_server_credentials *creds =
+    Z_WRAPPED_GRPC_SERVER_CREDS_P(creds_obj);
+#endif
   RETURN_LONG(grpc_server_add_secure_http2_port(server->wrapped, addr,
                                                 creds->wrapped));
 }
@@ -212,21 +302,33 @@ PHP_METHOD(Server, addSecureHttp2Port) {
  * @return Void
  */
 PHP_METHOD(Server, start) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_server *server =
       (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
+#endif
   grpc_server_start(server->wrapped);
 }
 
 static zend_function_entry server_methods[] = {
-    PHP_ME(Server, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
-    PHP_ME(Server, requestCall, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Server, addHttp2Port, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Server, addSecureHttp2Port, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Server, start, NULL, ZEND_ACC_PUBLIC) PHP_FE_END};
+  PHP_ME(Server, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
+  PHP_ME(Server, requestCall, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Server, addHttp2Port, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Server, addSecureHttp2Port, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Server, start, NULL, ZEND_ACC_PUBLIC)
+ PHP_FE_END
+};
 
 void grpc_init_server(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\Server", server_methods);
   ce.create_object = create_wrapped_grpc_server;
   grpc_ce_server = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&server_ce_handlers, zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  server_ce_handlers.offset = XtOffsetOf(wrapped_grpc_server, std);
+  server_ce_handlers.free_obj = free_wrapped_grpc_server;
+#endif
 }
diff --git a/src/php/ext/grpc/server.h b/src/php/ext/grpc/server.h
index 022257f37c..a7df456a11 100755
--- a/src/php/ext/grpc/server.h
+++ b/src/php/ext/grpc/server.h
@@ -48,13 +48,33 @@
 /* Class entry for the Server PHP class */
 extern zend_class_entry *grpc_ce_server;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Wrapper struct for grpc_server that can be associated with a PHP object */
 typedef struct wrapped_grpc_server {
   zend_object std;
+  grpc_server *wrapped;
+} wrapped_grpc_server;
 
+#else
+
+/* Wrapper struct for grpc_server that can be associated with a PHP object */
+typedef struct wrapped_grpc_server {
   grpc_server *wrapped;
+  zend_object std;
 } wrapped_grpc_server;
 
+static inline wrapped_grpc_server
+*wrapped_grpc_server_from_obj(zend_object *obj) {
+  return (wrapped_grpc_server*)((char*)(obj) -
+                                XtOffsetOf(wrapped_grpc_server, std));
+}
+
+#define Z_WRAPPED_GRPC_SERVER_P(zv)             \
+  wrapped_grpc_server_from_obj(Z_OBJ_P((zv)))
+
+#endif /* PHP_MAJOR_VERSION */
+
 /* Initializes the Server class */
 void grpc_init_server(TSRMLS_D);
 
diff --git a/src/php/ext/grpc/server_credentials.c b/src/php/ext/grpc/server_credentials.c
index 505da10a28..296632d5bd 100644
--- a/src/php/ext/grpc/server_credentials.c
+++ b/src/php/ext/grpc/server_credentials.c
@@ -51,6 +51,8 @@
 
 zend_class_entry *grpc_ce_server_credentials;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instace of wrapped_grpc_server_credentials */
 void free_wrapped_grpc_server_credentials(void *object TSRMLS_DC) {
   wrapped_grpc_server_credentials *creds =
@@ -58,6 +60,7 @@ void free_wrapped_grpc_server_credentials(void *object TSRMLS_DC) {
   if (creds->wrapped != NULL) {
     grpc_server_credentials_release(creds->wrapped);
   }
+  zend_object_std_dtor(&creds->std TSRMLS_CC);
   efree(creds);
 }
 
@@ -81,7 +84,8 @@ zend_object_value create_wrapped_grpc_server_credentials(
   return retval;
 }
 
-zval *grpc_php_wrap_server_credentials(grpc_server_credentials *wrapped TSRMLS_DC) {
+zval *grpc_php_wrap_server_credentials(grpc_server_credentials
+                                       *wrapped TSRMLS_DC) {
   zval *server_credentials_object;
   MAKE_STD_ZVAL(server_credentials_object);
   object_init_ex(server_credentials_object, grpc_ce_server_credentials);
@@ -92,6 +96,43 @@ zval *grpc_php_wrap_server_credentials(grpc_server_credentials *wrapped TSRMLS_D
   return server_credentials_object;
 }
 
+#else
+
+static zend_object_handlers server_credentials_ce_handlers;
+
+/* Frees and destroys an instace of wrapped_grpc_server_credentials */
+static void free_wrapped_grpc_server_credentials(zend_object *object) {
+  wrapped_grpc_server_credentials *creds =
+    wrapped_grpc_server_creds_from_obj(object);
+  if (creds->wrapped != NULL) {
+    grpc_server_credentials_release(creds->wrapped);
+  }
+  zend_object_std_dtor(&creds->std);
+}
+
+/* Initializes an instace of wrapped_grpc_server_credentials to be associated
+ * with an object of a class specified by class_type */
+zend_object *create_wrapped_grpc_server_credentials(zend_class_entry
+                                                    *class_type) {
+  wrapped_grpc_server_credentials *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_server_credentials) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &server_credentials_ce_handlers;
+  return &intern->std;
+}
+
+void grpc_php_wrap_server_credentials(grpc_server_credentials *wrapped,
+                                      zval *server_credentials_object) {
+  object_init_ex(server_credentials_object, grpc_ce_server_credentials);
+  wrapped_grpc_server_credentials *server_credentials =
+    Z_WRAPPED_GRPC_SERVER_CREDS_P(server_credentials_object);
+  server_credentials->wrapped = wrapped;
+}
+
+#endif
+
 /**
  * Create SSL credentials.
  * @param string pem_root_certs PEM encoding of the server root certificates
@@ -103,7 +144,11 @@ PHP_METHOD(ServerCredentials, createSsl) {
   char *pem_root_certs = 0;
   grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
 
+#if PHP_MAJOR_VERSION < 7
   int root_certs_length = 0, private_key_length, cert_chain_length;
+#else
+  size_t root_certs_length = 0, private_key_length, cert_chain_length;
+#endif
 
   /* "s!ss" == 1 nullable string, 2 strings */
   /* TODO: support multiple key cert pairs. */
@@ -120,17 +165,33 @@ PHP_METHOD(ServerCredentials, createSsl) {
   grpc_server_credentials *creds = grpc_ssl_server_credentials_create_ex(
       pem_root_certs, &pem_key_cert_pair, 1,
       GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE, NULL);
+#if PHP_MAJOR_VERSION < 7
   zval *creds_object = grpc_php_wrap_server_credentials(creds TSRMLS_CC);
   RETURN_DESTROY_ZVAL(creds_object);
+#else
+  grpc_php_wrap_server_credentials(creds, return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 static zend_function_entry server_credentials_methods[] = {
-    PHP_ME(ServerCredentials, createSsl, NULL,
-           ZEND_ACC_PUBLIC | ZEND_ACC_STATIC) PHP_FE_END};
+  PHP_ME(ServerCredentials, createSsl, NULL,
+         ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+   PHP_FE_END
+ };
 
 void grpc_init_server_credentials(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\ServerCredentials", server_credentials_methods);
   ce.create_object = create_wrapped_grpc_server_credentials;
   grpc_ce_server_credentials = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&server_credentials_ce_handlers,
+         zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  server_credentials_ce_handlers.offset =
+    XtOffsetOf(wrapped_grpc_server_credentials, std);
+  server_credentials_ce_handlers.free_obj =
+    free_wrapped_grpc_server_credentials;
+#endif
 }
diff --git a/src/php/ext/grpc/server_credentials.h b/src/php/ext/grpc/server_credentials.h
index 7101d65000..d37fafc0dc 100755
--- a/src/php/ext/grpc/server_credentials.h
+++ b/src/php/ext/grpc/server_credentials.h
@@ -49,14 +49,34 @@
 /* Class entry for the Server_Credentials PHP class */
 extern zend_class_entry *grpc_ce_server_credentials;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Wrapper struct for grpc_server_credentials that can be associated with a PHP
  * object */
 typedef struct wrapped_grpc_server_credentials {
   zend_object std;
+  grpc_server_credentials *wrapped;
+} wrapped_grpc_server_credentials;
 
+#else
+
+typedef struct wrapped_grpc_server_credentials {
   grpc_server_credentials *wrapped;
+  zend_object std;
 } wrapped_grpc_server_credentials;
 
+static inline wrapped_grpc_server_credentials
+*wrapped_grpc_server_creds_from_obj(zend_object *obj) {
+  return (wrapped_grpc_server_credentials*)
+    ((char*)(obj) -
+     XtOffsetOf(wrapped_grpc_server_credentials, std));
+}
+
+#define Z_WRAPPED_GRPC_SERVER_CREDS_P(zv)           \
+  wrapped_grpc_server_creds_from_obj(Z_OBJ_P((zv)))
+
+#endif /* PHP_MAJOR_VERSION */
+
 /* Initializes the Server_Credentials PHP class */
 void grpc_init_server_credentials(TSRMLS_D);
 
diff --git a/src/php/ext/grpc/timeval.c b/src/php/ext/grpc/timeval.c
index 5e242162a8..8dc997c2dd 100644
--- a/src/php/ext/grpc/timeval.c
+++ b/src/php/ext/grpc/timeval.c
@@ -52,8 +52,14 @@
 
 zend_class_entry *grpc_ce_timeval;
 
+#if PHP_MAJOR_VERSION < 7
+
 /* Frees and destroys an instance of wrapped_grpc_call */
-void free_wrapped_grpc_timeval(void *object TSRMLS_DC) { efree(object); }
+void free_wrapped_grpc_timeval(void *object TSRMLS_DC) {
+    wrapped_grpc_timeval *timeval = (wrapped_grpc_timeval *)object;
+    zend_object_std_dtor(&timeval->std TSRMLS_CC);
+    efree(timeval);
+}
 
 /* Initializes an instance of wrapped_grpc_timeval to be associated with an
  * object of a class specified by class_type */
@@ -83,14 +89,50 @@ zval *grpc_php_wrap_timeval(gpr_timespec wrapped TSRMLS_DC) {
   return timeval_object;
 }
 
+#else
+
+static zend_object_handlers timeval_ce_handlers;
+
+/* Frees and destroys an instance of wrapped_grpc_call */
+static void free_wrapped_grpc_timeval(zend_object *object) {
+  wrapped_grpc_timeval *timeval = wrapped_grpc_timeval_from_obj(object);
+  zend_object_std_dtor(&timeval->std);
+}
+
+/* Initializes an instance of wrapped_grpc_timeval to be associated with an
+ * object of a class specified by class_type */
+zend_object *create_wrapped_grpc_timeval(zend_class_entry *class_type) {
+  wrapped_grpc_timeval *intern;
+  intern = ecalloc(1, sizeof(wrapped_grpc_timeval) +
+                   zend_object_properties_size(class_type));
+  zend_object_std_init(&intern->std, class_type);
+  object_properties_init(&intern->std, class_type);
+  intern->std.handlers = &timeval_ce_handlers;
+  return &intern->std;
+}
+
+void grpc_php_wrap_timeval(gpr_timespec wrapped, zval *timeval_object) {
+  object_init_ex(timeval_object, grpc_ce_timeval);
+  wrapped_grpc_timeval *timeval = Z_WRAPPED_GRPC_TIMEVAL_P(timeval_object);
+  memcpy(&timeval->wrapped, &wrapped, sizeof(gpr_timespec));
+}
+
+#endif
+
 /**
  * Constructs a new instance of the Timeval class
  * @param long $usec The number of microseconds in the interval
  */
 PHP_METHOD(Timeval, __construct) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *timeval =
       (wrapped_grpc_timeval *)zend_object_store_get_object(getThis() TSRMLS_CC);
   long microseconds;
+#else
+  wrapped_grpc_timeval *timeval = Z_WRAPPED_GRPC_TIMEVAL_P(getThis());
+  zend_long microseconds;
+#endif
+
   /* "l" == 1 long */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &microseconds) ==
       FAILURE) {
@@ -110,6 +152,7 @@ PHP_METHOD(Timeval, __construct) {
  */
 PHP_METHOD(Timeval, add) {
   zval *other_obj;
+
   /* "O" == 1 Object */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O", &other_obj,
                             grpc_ce_timeval) == FAILURE) {
@@ -117,13 +160,23 @@ PHP_METHOD(Timeval, add) {
                          "add expects a Timeval", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *self =
       (wrapped_grpc_timeval *)zend_object_store_get_object(getThis() TSRMLS_CC);
   wrapped_grpc_timeval *other =
       (wrapped_grpc_timeval *)zend_object_store_get_object(other_obj TSRMLS_CC);
   zval *sum =
-      grpc_php_wrap_timeval(gpr_time_add(self->wrapped, other->wrapped) TSRMLS_CC);
+      grpc_php_wrap_timeval(gpr_time_add(self->wrapped, other->wrapped)
+                            TSRMLS_CC);
   RETURN_DESTROY_ZVAL(sum);
+#else
+  wrapped_grpc_timeval *self = Z_WRAPPED_GRPC_TIMEVAL_P(getThis());
+  wrapped_grpc_timeval *other = Z_WRAPPED_GRPC_TIMEVAL_P(other_obj);
+
+  grpc_php_wrap_timeval(gpr_time_add(self->wrapped, other->wrapped),
+                        return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -134,6 +187,7 @@ PHP_METHOD(Timeval, add) {
  */
 PHP_METHOD(Timeval, subtract) {
   zval *other_obj;
+
   /* "O" == 1 Object */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O", &other_obj,
                             grpc_ce_timeval) == FAILURE) {
@@ -141,13 +195,22 @@ PHP_METHOD(Timeval, subtract) {
                          "subtract expects a Timeval", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *self =
       (wrapped_grpc_timeval *)zend_object_store_get_object(getThis() TSRMLS_CC);
   wrapped_grpc_timeval *other =
       (wrapped_grpc_timeval *)zend_object_store_get_object(other_obj TSRMLS_CC);
   zval *diff =
-      grpc_php_wrap_timeval(gpr_time_sub(self->wrapped, other->wrapped) TSRMLS_CC);
+      grpc_php_wrap_timeval(gpr_time_sub(self->wrapped, other->wrapped)
+                            TSRMLS_CC);
   RETURN_DESTROY_ZVAL(diff);
+#else
+  wrapped_grpc_timeval *self = Z_WRAPPED_GRPC_TIMEVAL_P(getThis());
+  wrapped_grpc_timeval *other = Z_WRAPPED_GRPC_TIMEVAL_P(other_obj);
+  grpc_php_wrap_timeval(gpr_time_sub(self->wrapped, other->wrapped),
+                        return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -158,7 +221,9 @@ PHP_METHOD(Timeval, subtract) {
  * @return long
  */
 PHP_METHOD(Timeval, compare) {
-  zval *a_obj, *b_obj;
+  zval *a_obj;
+  zval *b_obj;
+
   /* "OO" == 2 Objects */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OO", &a_obj,
                             grpc_ce_timeval, &b_obj,
@@ -167,10 +232,15 @@ PHP_METHOD(Timeval, compare) {
                          "compare expects two Timevals", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *a =
       (wrapped_grpc_timeval *)zend_object_store_get_object(a_obj TSRMLS_CC);
   wrapped_grpc_timeval *b =
       (wrapped_grpc_timeval *)zend_object_store_get_object(b_obj TSRMLS_CC);
+#else
+  wrapped_grpc_timeval *a = Z_WRAPPED_GRPC_TIMEVAL_P(a_obj);
+  wrapped_grpc_timeval *b = Z_WRAPPED_GRPC_TIMEVAL_P(b_obj);
+#endif
   long result = gpr_time_cmp(a->wrapped, b->wrapped);
   RETURN_LONG(result);
 }
@@ -183,7 +253,10 @@ PHP_METHOD(Timeval, compare) {
  * @return bool True if $a and $b are within $threshold, False otherwise
  */
 PHP_METHOD(Timeval, similar) {
-  zval *a_obj, *b_obj, *thresh_obj;
+  zval *a_obj;
+  zval *b_obj;
+  zval *thresh_obj;
+
   /* "OOO" == 3 Objects */
   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OOO", &a_obj,
                             grpc_ce_timeval, &b_obj, grpc_ce_timeval,
@@ -192,6 +265,7 @@ PHP_METHOD(Timeval, similar) {
                          "compare expects three Timevals", 1 TSRMLS_CC);
     return;
   }
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *a =
       (wrapped_grpc_timeval *)zend_object_store_get_object(a_obj TSRMLS_CC);
   wrapped_grpc_timeval *b =
@@ -199,6 +273,11 @@ PHP_METHOD(Timeval, similar) {
   wrapped_grpc_timeval *thresh =
       (wrapped_grpc_timeval *)zend_object_store_get_object(
           thresh_obj TSRMLS_CC);
+#else
+  wrapped_grpc_timeval *a = Z_WRAPPED_GRPC_TIMEVAL_P(a_obj);
+  wrapped_grpc_timeval *b = Z_WRAPPED_GRPC_TIMEVAL_P(b_obj);
+  wrapped_grpc_timeval *thresh = Z_WRAPPED_GRPC_TIMEVAL_P(thresh_obj);
+#endif
   int result = gpr_time_similar(a->wrapped, b->wrapped, thresh->wrapped);
   RETURN_BOOL(result);
 }
@@ -208,8 +287,13 @@ PHP_METHOD(Timeval, similar) {
  * @return Timeval The current time
  */
 PHP_METHOD(Timeval, now) {
+#if PHP_MAJOR_VERSION < 7
   zval *now = grpc_php_wrap_timeval(gpr_now(GPR_CLOCK_REALTIME) TSRMLS_CC);
   RETURN_DESTROY_ZVAL(now);
+#else
+  grpc_php_wrap_timeval(gpr_now(GPR_CLOCK_REALTIME), return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -217,11 +301,18 @@ PHP_METHOD(Timeval, now) {
  * @return Timeval Zero length time interval
  */
 PHP_METHOD(Timeval, zero) {
+#if PHP_MAJOR_VERSION < 7
   zval *grpc_php_timeval_zero =
       grpc_php_wrap_timeval(gpr_time_0(GPR_CLOCK_REALTIME) TSRMLS_CC);
   RETURN_ZVAL(grpc_php_timeval_zero,
               false, /* Copy original before returning? */
               true /* Destroy original before returning */);
+#else
+  grpc_php_wrap_timeval(gpr_time_0(GPR_CLOCK_REALTIME), return_value);
+  RETURN_ZVAL(return_value,
+              false, /* Copy original before returning? */
+              true /* Destroy original before returning */);
+#endif
 }
 
 /**
@@ -229,9 +320,14 @@ PHP_METHOD(Timeval, zero) {
  * @return Timeval Infinite future time value
  */
 PHP_METHOD(Timeval, infFuture) {
+#if PHP_MAJOR_VERSION < 7
   zval *grpc_php_timeval_inf_future =
       grpc_php_wrap_timeval(gpr_inf_future(GPR_CLOCK_REALTIME) TSRMLS_CC);
   RETURN_DESTROY_ZVAL(grpc_php_timeval_inf_future);
+#else
+  grpc_php_wrap_timeval(gpr_inf_future(GPR_CLOCK_REALTIME), return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -239,9 +335,14 @@ PHP_METHOD(Timeval, infFuture) {
  * @return Timeval Infinite past time value
  */
 PHP_METHOD(Timeval, infPast) {
+#if PHP_MAJOR_VERSION < 7
   zval *grpc_php_timeval_inf_past =
       grpc_php_wrap_timeval(gpr_inf_past(GPR_CLOCK_REALTIME) TSRMLS_CC);
   RETURN_DESTROY_ZVAL(grpc_php_timeval_inf_past);
+#else
+  grpc_php_wrap_timeval(gpr_inf_past(GPR_CLOCK_REALTIME), return_value);
+  RETURN_DESTROY_ZVAL(return_value);
+#endif
 }
 
 /**
@@ -249,28 +350,41 @@ PHP_METHOD(Timeval, infPast) {
  * @return void
  */
 PHP_METHOD(Timeval, sleepUntil) {
+#if PHP_MAJOR_VERSION < 7
   wrapped_grpc_timeval *this =
       (wrapped_grpc_timeval *)zend_object_store_get_object(getThis() TSRMLS_CC);
+#else
+  wrapped_grpc_timeval *this = Z_WRAPPED_GRPC_TIMEVAL_P(getThis());
+#endif
   gpr_sleep_until(this->wrapped);
 }
 
 static zend_function_entry timeval_methods[] = {
-    PHP_ME(Timeval, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
-    PHP_ME(Timeval, add, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Timeval, compare, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-    PHP_ME(Timeval, infFuture, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-    PHP_ME(Timeval, infPast, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-    PHP_ME(Timeval, now, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-    PHP_ME(Timeval, similar, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-    PHP_ME(Timeval, sleepUntil, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Timeval, subtract, NULL, ZEND_ACC_PUBLIC)
-    PHP_ME(Timeval, zero, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC) PHP_FE_END};
+  PHP_ME(Timeval, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
+  PHP_ME(Timeval, add, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Timeval, compare, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_ME(Timeval, infFuture, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_ME(Timeval, infPast, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_ME(Timeval, now, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_ME(Timeval, similar, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_ME(Timeval, sleepUntil, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Timeval, subtract, NULL, ZEND_ACC_PUBLIC)
+  PHP_ME(Timeval, zero, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_FE_END
+};
 
 void grpc_init_timeval(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\Timeval", timeval_methods);
   ce.create_object = create_wrapped_grpc_timeval;
   grpc_ce_timeval = zend_register_internal_class(&ce TSRMLS_CC);
+#if PHP_MAJOR_VERSION >= 7
+  memcpy(&timeval_ce_handlers, zend_get_std_object_handlers(),
+         sizeof(zend_object_handlers));
+  timeval_ce_handlers.offset =
+    XtOffsetOf(wrapped_grpc_timeval, std);
+  timeval_ce_handlers.free_obj = free_wrapped_grpc_timeval;
+#endif
 }
 
 void grpc_shutdown_timeval(TSRMLS_D) {}
diff --git a/src/php/ext/grpc/timeval.h b/src/php/ext/grpc/timeval.h
index 7456eb6d58..d4eb2facde 100755
--- a/src/php/ext/grpc/timeval.h
+++ b/src/php/ext/grpc/timeval.h
@@ -50,12 +50,31 @@
 extern zend_class_entry *grpc_ce_timeval;
 
 /* Wrapper struct for timeval that can be associated with a PHP object */
+#if PHP_MAJOR_VERSION < 7
+
 typedef struct wrapped_grpc_timeval {
   zend_object std;
+  gpr_timespec wrapped;
+} wrapped_grpc_timeval;
 
+#else
+
+typedef struct wrapped_grpc_timeval {
   gpr_timespec wrapped;
+  zend_object std;
 } wrapped_grpc_timeval;
 
+static inline wrapped_grpc_timeval
+*wrapped_grpc_timeval_from_obj(zend_object *obj) {
+  return (wrapped_grpc_timeval*)((char*)(obj) -
+                                 XtOffsetOf(wrapped_grpc_timeval, std));
+}
+
+#define Z_WRAPPED_GRPC_TIMEVAL_P(zv)            \
+  wrapped_grpc_timeval_from_obj(Z_OBJ_P((zv)))
+
+#endif /* PHP_MAJOR_VERSION */
+
 /* Initialize the Timeval PHP class */
 void grpc_init_timeval(TSRMLS_D);
 
@@ -63,6 +82,10 @@ void grpc_init_timeval(TSRMLS_D);
 void grpc_shutdown_timeval(TSRMLS_D);
 
 /* Creates a Timeval object that wraps the given timeval struct */
+#if PHP_MAJOR_VERSION < 7
 zval *grpc_php_wrap_timeval(gpr_timespec wrapped TSRMLS_DC);
+#else
+void grpc_php_wrap_timeval(gpr_timespec wrapped, zval *timeval_object);
+#endif /* PHP_MAJOR_VERSION */
 
 #endif /* NET_GRPC_PHP_GRPC_TIMEVAL_H_ */
diff --git a/src/php/lib/Grpc/BaseStub.php b/src/php/lib/Grpc/BaseStub.php
index df3fe85d44..2fec1bd9cc 100755..100644
--- a/src/php/lib/Grpc/BaseStub.php
+++ b/src/php/lib/Grpc/BaseStub.php
@@ -84,8 +84,8 @@ class BaseStub
         }
         if ($channel) {
             if (!is_a($channel, 'Channel')) {
-                throw new \Exception("The channel argument is not a".
-                                     "Channel object");
+                throw new \Exception('The channel argument is not a'.
+                                     'Channel object');
             }
             $this->channel = $channel;
         } else {
diff --git a/src/php/lib/Grpc/BidiStreamingCall.php b/src/php/lib/Grpc/BidiStreamingCall.php
index 95e51c5088..c2fdb94b86 100644
--- a/src/php/lib/Grpc/BidiStreamingCall.php
+++ b/src/php/lib/Grpc/BidiStreamingCall.php
@@ -113,6 +113,7 @@ class BidiStreamingCall extends AbstractCall
         ]);
 
         $this->trailing_metadata = $status_event->status->metadata;
+
         return $status_event->status;
     }
 }
diff --git a/src/php/lib/Grpc/ClientStreamingCall.php b/src/php/lib/Grpc/ClientStreamingCall.php
index 315a406735..4050f7ed06 100644
--- a/src/php/lib/Grpc/ClientStreamingCall.php
+++ b/src/php/lib/Grpc/ClientStreamingCall.php
@@ -88,6 +88,7 @@ class ClientStreamingCall extends AbstractCall
 
         $status = $event->status;
         $this->trailing_metadata = $status->metadata;
+
         return [$this->deserializeResponse($event->message), $status];
     }
 }
diff --git a/src/php/lib/Grpc/ServerStreamingCall.php b/src/php/lib/Grpc/ServerStreamingCall.php
index 53599fe4ae..ba89d9f972 100644
--- a/src/php/lib/Grpc/ServerStreamingCall.php
+++ b/src/php/lib/Grpc/ServerStreamingCall.php
@@ -92,6 +92,7 @@ class ServerStreamingCall extends AbstractCall
         ]);
 
         $this->trailing_metadata = $status_event->status->metadata;
+
         return $status_event->status;
     }
 }
diff --git a/src/php/lib/Grpc/UnaryCall.php b/src/php/lib/Grpc/UnaryCall.php
index b114b771b8..a71b05dc93 100644
--- a/src/php/lib/Grpc/UnaryCall.php
+++ b/src/php/lib/Grpc/UnaryCall.php
@@ -77,6 +77,7 @@ class UnaryCall extends AbstractCall
 
         $status = $event->status;
         $this->trailing_metadata = $status->metadata;
+
         return [$this->deserializeResponse($event->message), $status];
     }
 }
diff --git a/src/php/tests/interop/interop_client.php b/src/php/tests/interop/interop_client.php
index 43b3199d92..bf40549a04 100755
--- a/src/php/tests/interop/interop_client.php
+++ b/src/php/tests/interop/interop_client.php
@@ -450,7 +450,7 @@ function statusCodeAndMessage($stub)
 {
     $echo_status = new grpc\testing\EchoStatus();
     $echo_status->setCode(2);
-    $echo_status->setMessage("test status message");
+    $echo_status->setMessage('test status message');
 
     $request = new grpc\testing\SimpleRequest();
     $request->setResponseStatus($echo_status);
@@ -460,7 +460,7 @@ function statusCodeAndMessage($stub)
 
     hardAssert($status->code === 2,
                'Received unexpected status code');
-    hardAssert($status->details === "test status message",
+    hardAssert($status->details === 'test status message',
                'Received unexpected status details');
 
     $streaming_call = $stub->FullDuplexCall();
@@ -473,7 +473,7 @@ function statusCodeAndMessage($stub)
     $status = $streaming_call->getStatus();
     hardAssert($status->code === 2,
                'Received unexpected status code');
-    hardAssert($status->details === "test status message",
+    hardAssert($status->details === 'test status message',
                'Received unexpected status details');
 }
 
@@ -570,9 +570,9 @@ function _makeStub($args)
     }
 
     if ($test_case == 'unimplemented_method') {
-      $stub = new grpc\testing\UnimplementedServiceClient($server_address, $opts);
+        $stub = new grpc\testing\UnimplementedServiceClient($server_address, $opts);
     } else {
-      $stub = new grpc\testing\TestServiceClient($server_address, $opts);
+        $stub = new grpc\testing\TestServiceClient($server_address, $opts);
     }
 
     return $stub;
diff --git a/src/php/tests/unit_tests/CallCredentialsTest.php b/src/php/tests/unit_tests/CallCredentialsTest.php
index 5fec06cd13..1994c8afe5 100644
--- a/src/php/tests/unit_tests/CallCredentialsTest.php
+++ b/src/php/tests/unit_tests/CallCredentialsTest.php
@@ -148,7 +148,8 @@ class CallCredentialsTest extends PHPUnit_Framework_TestCase
             $this->call_credentials,
             $call_credentials2
         );
-        $this->assertSame('Grpc\CallCredentials', get_class($call_credentials3));
+        $this->assertSame('Grpc\CallCredentials',
+                          get_class($call_credentials3));
     }
 
     /**
diff --git a/src/php/tests/unit_tests/CallTest.php b/src/php/tests/unit_tests/CallTest.php
index fa026f0935..d736f51546 100755..100644
--- a/src/php/tests/unit_tests/CallTest.php
+++ b/src/php/tests/unit_tests/CallTest.php
@@ -50,6 +50,18 @@ class CallTest extends PHPUnit_Framework_TestCase
                                     Grpc\Timeval::infFuture());
     }
 
+    public function tearDown()
+    {
+        unset($this->call);
+        unset($this->channel);
+    }
+
+    public function testConstructor()
+    {
+        $this->assertSame('Grpc\Call', get_class($this->call));
+        $this->assertObjectHasAttribute('channel', $this->call);
+    }
+
     public function testAddEmptyMetadata()
     {
         $batch = [
@@ -81,7 +93,8 @@ class CallTest extends PHPUnit_Framework_TestCase
     {
         $batch = [
             Grpc\OP_SEND_INITIAL_METADATA => ['key1' => ['value1'],
-                                              'key2' => ['value2', 'value3'], ],
+                                              'key2' => ['value2',
+                                                         'value3'], ],
         ];
         $result = $this->call->startBatch($batch);
         $this->assertTrue($result->send_metadata);
@@ -118,4 +131,38 @@ class CallTest extends PHPUnit_Framework_TestCase
         ];
         $result = $this->call->startBatch($batch);
     }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidConstuctor()
+    {
+        $this->call = new Grpc\Call();
+        $this->assertNull($this->call);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidConstuctor2()
+    {
+        $this->call = new Grpc\Call('hi', 'hi', 'hi');
+        $this->assertNull($this->call);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidSetCredentials()
+    {
+        $this->call->setCredentials('hi');
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidSetCredentials2()
+    {
+        $this->call->setCredentials([]);
+    }
 }
diff --git a/src/php/tests/unit_tests/ChannelCredentialsTest.php b/src/php/tests/unit_tests/ChannelCredentialsTest.php
index 56c1d8f006..e822929ccd 100644
--- a/src/php/tests/unit_tests/ChannelCredentialsTest.php
+++ b/src/php/tests/unit_tests/ChannelCredentialsTest.php
@@ -42,10 +42,23 @@ class ChanellCredentialsTest extends PHPUnit_Framework_TestCase
     {
     }
 
-    public function testCreateDefault()
+    public function testCreateSslWith3Null()
     {
-        $channel_credentials = Grpc\ChannelCredentials::createDefault();
-        $this->assertSame('Grpc\ChannelCredentials', get_class($channel_credentials));
+        $channel_credentials = Grpc\ChannelCredentials::createSsl(null, null,
+                                                                  null);
+        $this->assertNotNull($channel_credentials);
+    }
+
+    public function testCreateSslWith3NullString()
+    {
+        $channel_credentials = Grpc\ChannelCredentials::createSsl('', '', '');
+        $this->assertNotNull($channel_credentials);
+    }
+
+    public function testCreateInsecure()
+    {
+        $channel_credentials = Grpc\ChannelCredentials::createInsecure();
+        $this->assertNull($channel_credentials);
     }
 
     /**
@@ -64,10 +77,4 @@ class ChanellCredentialsTest extends PHPUnit_Framework_TestCase
         $channel_credentials = Grpc\ChannelCredentials::createComposite(
             'something', 'something');
     }
-
-    public function testCreateInsecure()
-    {
-        $channel_credentials = Grpc\ChannelCredentials::createInsecure();
-        $this->assertNull($channel_credentials);
-    }
 }
diff --git a/src/php/tests/unit_tests/ChannelTest.php b/src/php/tests/unit_tests/ChannelTest.php
index a1f9053c39..4b35b1a28c 100644
--- a/src/php/tests/unit_tests/ChannelTest.php
+++ b/src/php/tests/unit_tests/ChannelTest.php
@@ -40,6 +40,7 @@ class ChannelTest extends PHPUnit_Framework_TestCase
 
     public function tearDown()
     {
+        unset($this->channel);
     }
 
     public function testInsecureCredentials()
@@ -53,6 +54,82 @@ class ChannelTest extends PHPUnit_Framework_TestCase
         $this->assertSame('Grpc\Channel', get_class($this->channel));
     }
 
+    public function testGetConnectivityState()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $state = $this->channel->getConnectivityState();
+        $this->assertEquals(0, $state);
+    }
+
+    public function testGetConnectivityStateWithInt()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $state = $this->channel->getConnectivityState(123);
+        $this->assertEquals(0, $state);
+    }
+
+    public function testGetConnectivityStateWithString()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $state = $this->channel->getConnectivityState('hello');
+        $this->assertEquals(0, $state);
+    }
+
+    public function testGetConnectivityStateWithBool()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $state = $this->channel->getConnectivityState(true);
+        $this->assertEquals(0, $state);
+    }
+
+    public function testGetTarget()
+    {
+        $this->channel = new Grpc\Channel('localhost:8888',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $target = $this->channel->getTarget();
+        $this->assertTrue(is_string($target));
+    }
+
+    public function testWatchConnectivityState()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $time = new Grpc\Timeval(1000);
+        $state = $this->channel->watchConnectivityState(123, $time);
+        $this->assertTrue($state);
+        unset($time);
+    }
+
+    public function testClose()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $this->assertNotNull($this->channel);
+        $this->channel->close();
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidConstructorWithNull()
+    {
+        $this->channel = new Grpc\Channel();
+        $this->assertNull($this->channel);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidConstructorWith()
+    {
+        $this->channel = new Grpc\Channel('localhost', 'invalid');
+        $this->assertNull($this->channel);
+    }
+
     /**
      * @expectedException InvalidArgumentException
      */
@@ -78,4 +155,34 @@ class ChannelTest extends PHPUnit_Framework_TestCase
             ]
         );
     }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidGetConnectivityStateWithArray()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+            ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $this->channel->getConnectivityState([]);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidWatchConnectivityState()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+            ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $this->channel->watchConnectivityState([]);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidWatchConnectivityState2()
+    {
+        $this->channel = new Grpc\Channel('localhost:0',
+            ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+        $this->channel->watchConnectivityState(1, 'hi');
+    }
 }
diff --git a/src/php/tests/unit_tests/EndToEndTest.php b/src/php/tests/unit_tests/EndToEndTest.php
index 2b09f9d112..09364580c0 100755..100644
--- a/src/php/tests/unit_tests/EndToEndTest.php
+++ b/src/php/tests/unit_tests/EndToEndTest.php
@@ -521,7 +521,8 @@ class EndToEndTest extends PHPUnit_Framework_TestCase
 
     public function testGetConnectivityState()
     {
-        $this->assertTrue($this->channel->getConnectivityState() == Grpc\CHANNEL_IDLE);
+        $this->assertTrue($this->channel->getConnectivityState() ==
+                          Grpc\CHANNEL_IDLE);
     }
 
     public function testWatchConnectivityStateFailed()
diff --git a/src/php/tests/unit_tests/SecureEndToEndTest.php b/src/php/tests/unit_tests/SecureEndToEndTest.php
index c388ee5031..c388ee5031 100755..100644
--- a/src/php/tests/unit_tests/SecureEndToEndTest.php
+++ b/src/php/tests/unit_tests/SecureEndToEndTest.php
diff --git a/src/php/tests/unit_tests/ServerTest.php b/src/php/tests/unit_tests/ServerTest.php
index 76aaa06970..f2346ab113 100644
--- a/src/php/tests/unit_tests/ServerTest.php
+++ b/src/php/tests/unit_tests/ServerTest.php
@@ -36,10 +36,70 @@ class ServerTest extends PHPUnit_Framework_TestCase
 {
     public function setUp()
     {
+        $this->server = null;
     }
 
     public function tearDown()
     {
+        unset($this->server);
+    }
+
+    public function testConstructorWithNull()
+    {
+        $this->server = new Grpc\Server();
+        $this->assertNotNull($this->server);
+    }
+
+    public function testConstructorWithNullArray()
+    {
+        $this->server = new Grpc\Server([]);
+        $this->assertNotNull($this->server);
+    }
+
+    public function testConstructorWithArray()
+    {
+        // key of array must be string
+         $this->server = new Grpc\Server(['ip' => '127.0.0.1',
+                                          'port' => '8080', ]);
+        $this->assertNotNull($this->server);
+    }
+
+    public function testRequestCall()
+    {
+        $this->server = new Grpc\Server();
+        $port = $this->server->addHttp2Port('0.0.0.0:8888');
+        $this->server->start();
+        $channel = new Grpc\Channel('localhost:8888',
+             ['credentials' => Grpc\ChannelCredentials::createInsecure()]);
+
+        $deadline = Grpc\Timeval::infFuture();
+        $call = new Grpc\Call($channel, 'dummy_method', $deadline);
+
+        $event = $call->startBatch([Grpc\OP_SEND_INITIAL_METADATA => [],
+                                    Grpc\OP_SEND_CLOSE_FROM_CLIENT => true,
+                                    ]);
+
+        $c = $this->server->requestCall();
+        $this->assertObjectHasAttribute('call', $c);
+        $this->assertObjectHasAttribute('method', $c);
+        $this->assertSame('dummy_method', $c->method);
+        $this->assertObjectHasAttribute('host', $c);
+        $this->assertTrue(is_string($c->host));
+        $this->assertObjectHasAttribute('absolute_deadline', $c);
+        $this->assertObjectHasAttribute('metadata', $c);
+
+        unset($call);
+        unset($channel);
+    }
+
+    private function createSslObj()
+    {
+        $server_credentials = Grpc\ServerCredentials::createSsl(
+             null,
+             file_get_contents(dirname(__FILE__).'/../data/server1.key'),
+             file_get_contents(dirname(__FILE__).'/../data/server1.pem'));
+
+        return $server_credentials;
     }
 
     /**
@@ -47,7 +107,8 @@ class ServerTest extends PHPUnit_Framework_TestCase
      */
     public function testInvalidConstructor()
     {
-        $server = new Grpc\Server('invalid_host');
+        $this->server = new Grpc\Server('invalid_host');
+        $this->assertNull($this->server);
     }
 
     /**
@@ -56,7 +117,7 @@ class ServerTest extends PHPUnit_Framework_TestCase
     public function testInvalidAddHttp2Port()
     {
         $this->server = new Grpc\Server([]);
-        $this->port = $this->server->addHttp2Port(['0.0.0.0:0']);
+        $port = $this->server->addHttp2Port(['0.0.0.0:0']);
     }
 
     /**
@@ -65,6 +126,24 @@ class ServerTest extends PHPUnit_Framework_TestCase
     public function testInvalidAddSecureHttp2Port()
     {
         $this->server = new Grpc\Server([]);
-        $this->port = $this->server->addSecureHttp2Port(['0.0.0.0:0']);
+        $port = $this->server->addSecureHttp2Port(['0.0.0.0:0']);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidAddSecureHttp2Port2()
+    {
+        $this->server = new Grpc\Server();
+        $port = $this->server->addSecureHttp2Port('0.0.0.0:0');
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidAddSecureHttp2Port3()
+    {
+        $this->server = new Grpc\Server();
+        $port = $this->server->addSecureHttp2Port('0.0.0.0:0', 'invalid');
     }
 }
diff --git a/src/php/tests/unit_tests/TimevalTest.php b/src/php/tests/unit_tests/TimevalTest.php
index a3dbce079f..2d19f64c79 100755..100644
--- a/src/php/tests/unit_tests/TimevalTest.php
+++ b/src/php/tests/unit_tests/TimevalTest.php
@@ -33,6 +33,57 @@
  */
 class TimevalTest extends PHPUnit_Framework_TestCase
 {
+    public function setUp()
+    {
+    }
+
+    public function tearDown()
+    {
+        unset($this->time);
+    }
+
+    public function testConstructorWithInt()
+    {
+        $this->time = new Grpc\Timeval(1234);
+        $this->assertNotNull($this->time);
+        $this->assertSame('Grpc\Timeval', get_class($this->time));
+    }
+
+    public function testConstructorWithNegative()
+    {
+        $this->time = new Grpc\Timeval(-123);
+        $this->assertNotNull($this->time);
+        $this->assertSame('Grpc\Timeval', get_class($this->time));
+    }
+
+    public function testConstructorWithZero()
+    {
+        $this->time = new Grpc\Timeval(0);
+        $this->assertNotNull($this->time);
+        $this->assertSame('Grpc\Timeval', get_class($this->time));
+    }
+
+    public function testConstructorWithOct()
+    {
+        $this->time = new Grpc\Timeval(0123);
+        $this->assertNotNull($this->time);
+        $this->assertSame('Grpc\Timeval', get_class($this->time));
+    }
+
+    public function testConstructorWithHex()
+    {
+        $this->time = new Grpc\Timeval(0x1A);
+        $this->assertNotNull($this->time);
+        $this->assertSame('Grpc\Timeval', get_class($this->time));
+    }
+
+    public function testConstructorWithFloat()
+    {
+        $this->time = new Grpc\Timeval(123.456);
+        $this->assertNotNull($this->time);
+        $this->assertSame('Grpc\Timeval', get_class($this->time));
+    }
+
     public function testCompareSame()
     {
         $zero = Grpc\Timeval::zero();
@@ -70,6 +121,7 @@ class TimevalTest extends PHPUnit_Framework_TestCase
     public function testNowAndAdd()
     {
         $now = Grpc\Timeval::now();
+        $this->assertNotNull($now);
         $delta = new Grpc\Timeval(1000);
         $deadline = $now->add($delta);
         $this->assertGreaterThan(0, Grpc\Timeval::compare($deadline, $now));
@@ -154,5 +206,6 @@ class TimevalTest extends PHPUnit_Framework_TestCase
     public function testSimilarInvalidParam()
     {
         $a = Grpc\Timeval::similar(1000, 1100, 1200);
+        $this->assertNull($delta);
     }
 }
diff --git a/src/python/grpcio/.gitignore b/src/python/grpcio/.gitignore
index 7cd8fab273..3309795948 100644
--- a/src/python/grpcio/.gitignore
+++ b/src/python/grpcio/.gitignore
@@ -14,3 +14,4 @@ doc/
 _grpcio_metadata.py
 htmlcov/
 grpc/_cython/_credentials
+poison.c
diff --git a/src/python/grpcio/_unixccompiler_patch.py b/src/python/grpcio/_unixccompiler_patch.py
index 0ce5d63e98..894c3ef395 100644
--- a/src/python/grpcio/_unixccompiler_patch.py
+++ b/src/python/grpcio/_unixccompiler_patch.py
@@ -34,6 +34,7 @@ from distutils import errors
 from distutils import unixccompiler
 import os
 import os.path
+import shlex
 import shutil
 import sys
 import tempfile
@@ -47,6 +48,9 @@ def _unix_commandfile_spawn(self, command):
   Some commands like `gcc` (and friends like `clang`) support command files to
   work around shell command length limits.
   """
+  # Sometimes distutils embeds the executables as full strings including some
+  # hard-coded flags rather than as lists.
+  command = list(shlex.split(command[0])) + list(command[1:])
   command_base = os.path.basename(command[0].strip())
   if command_base == 'ccache':
     command_base = command[:2]
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 86a73fa836..d36ac23305 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -184,6 +184,71 @@ class BuildPy(build_py.build_py):
     build_py.build_py.run(self)
 
 
+def _poison_extensions(extensions, message):
+  """Includes a file that will always fail to compile in all extensions."""
+  poison_filename = os.path.join(PYTHON_STEM, 'poison.c')
+  with open(poison_filename, 'w') as poison:
+    poison.write('#error {}'.format(message))
+  for extension in extensions:
+    extension.sources = [poison_filename]
+
+def check_and_update_cythonization(extensions):
+  """Replace .pyx files with their generated counterparts and return whether or
+     not cythonization still needs to occur."""
+  for extension in extensions:
+    generated_pyx_sources = []
+    other_sources = []
+    for source in extension.sources:
+      base, file_ext = os.path.splitext(source)
+      if file_ext == '.pyx':
+        generated_pyx_source = next(
+            (base + gen_ext for gen_ext in ('.c', '.cpp',)
+             if os.path.isfile(base + gen_ext)), None)
+        if generated_pyx_source:
+          generated_pyx_sources.append(generated_pyx_source)
+        else:
+          sys.stderr.write('Cython-generated files are missing...\n')
+          return False
+      else:
+        other_sources.append(source)
+    extension.sources = generated_pyx_sources + other_sources
+  sys.stderr.write('Found cython-generated files...\n')
+  return True
+
+def try_cythonize(extensions, linetracing=False, mandatory=True):
+  """Attempt to cythonize the extensions.
+
+  Args:
+    extensions: A list of `distutils.extension.Extension`.
+    linetracing: A bool indicating whether or not to enable linetracing.
+    mandatory: Whether or not having Cython-generated files is mandatory. If it
+      is, extensions will be poisoned when they can't be fully generated.
+  """
+  try:
+    # Break import style to ensure we have access to Cython post-setup_requires
+    import Cython.Build
+  except ImportError:
+    if mandatory:
+      sys.stderr.write(
+          "This package needs to generate C files with Cython but it cannot. "
+          "Poisoning extension sources to disallow extension commands...")
+      _poison_extensions(
+          extensions,
+          "Extensions have been poisoned due to missing Cython-generated code.")
+    return extensions
+  cython_compiler_directives = {}
+  if linetracing:
+    additional_define_macros = [('CYTHON_TRACE_NOGIL', '1')]
+    cython_compiler_directives['linetrace'] = True
+  return Cython.Build.cythonize(
+    extensions,
+    include_path=[
+      include_dir for extension in extensions for include_dir in extension.include_dirs
+    ],
+    compiler_directives=cython_compiler_directives
+  )
+
+
 class BuildExt(build_ext.build_ext):
   """Custom build_ext command to enable compiler-specific flags."""
 
@@ -201,6 +266,8 @@ class BuildExt(build_ext.build_ext):
     if compiler in BuildExt.LINK_OPTIONS:
       for extension in self.extensions:
         extension.extra_link_args += list(BuildExt.LINK_OPTIONS[compiler])
+    if not check_and_update_cythonization(self.extensions):
+      self.extensions = try_cythonize(self.extensions)
     try:
       build_ext.build_ext.build_extensions(self)
     except Exception as error:
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index fd015129f0..513839df7d 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -345,7 +345,7 @@ class Call(six.with_metaclass(abc.ABCMeta, RpcContext)):
     This method blocks until the value is available.
 
     Returns:
-      The bytes of the details of the RPC.
+      The details string of the RPC.
     """
     raise NotImplementedError()
 
@@ -764,7 +764,7 @@ class ServicerContext(six.with_metaclass(abc.ABCMeta, RpcContext)):
     details to transmit.
 
     Args:
-      details: The details bytes of the RPC to be transmitted to
+      details: The details string of the RPC to be transmitted to
         the invocation side of the RPC.
     """
     raise NotImplementedError()
diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index 29dbc3a668..3117dd1cb3 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -353,12 +353,12 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
     else:
       return max(self._deadline - time.time(), 0)
 
-  def add_cancellation_callback(self, callback):
+  def add_callback(self, callback):
     with self._state.condition:
       if self._state.callbacks is None:
         return False
       else:
-        self._state.callbacks.append(lambda unused_future: callback())
+        self._state.callbacks.append(lambda: callback())
         return True
 
   def initial_metadata(self):
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 7714504d1b..42fced6545 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -30,19 +30,29 @@
 cimport libc.time
 
 
-cdef extern from "grpc/_cython/loader.h":
+# Typedef types with approximately the same semantics to provide their names to
+# Cython
+ctypedef int int32_t
+ctypedef unsigned uint32_t
+ctypedef long int64_t
 
-  ctypedef int int32_t
-  ctypedef unsigned uint32_t
-  ctypedef long int64_t
 
-  int pygrpc_load_core(char*)
-  int pygrpc_initialize_core()
+cdef extern from "grpc/support/alloc.h":
 
   void *gpr_malloc(size_t size) nogil
   void gpr_free(void *ptr) nogil
   void *gpr_realloc(void *p, size_t size) nogil
 
+
+cdef extern from "grpc/byte_buffer_reader.h":
+
+  struct grpc_byte_buffer_reader:
+    # We don't care about the internals
+    pass
+
+
+cdef extern from "grpc/grpc.h":
+
   ctypedef struct gpr_slice:
     # don't worry about writing out the members of gpr_slice; we never access
     # them directly.
@@ -86,7 +96,22 @@ cdef extern from "grpc/_cython/loader.h":
   gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b) nogil
 
   int gpr_time_cmp(gpr_timespec a, gpr_timespec b) nogil
-  
+
+  ctypedef struct grpc_byte_buffer:
+    # We don't care about the internals.
+    pass
+
+  grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
+                                                size_t nslices) nogil
+  size_t grpc_byte_buffer_length(grpc_byte_buffer *bb) nogil
+  void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer) nogil
+
+  int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                   grpc_byte_buffer *buffer) nogil
+  int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
+                                   gpr_slice *slice) nogil
+  void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader) nogil
+
   ctypedef enum grpc_status_code:
     GRPC_STATUS_OK
     GRPC_STATUS_CANCELLED
@@ -107,37 +132,6 @@ cdef extern from "grpc/_cython/loader.h":
     GRPC_STATUS_DATA_LOSS
     GRPC_STATUS__DO_NOT_USE
 
-  ctypedef enum grpc_ssl_roots_override_result:
-    GRPC_SSL_ROOTS_OVERRIDE_OK
-    GRPC_SSL_ROOTS_OVERRIDE_FAILED_PERMANENTLY
-    GRPC_SSL_ROOTS_OVERRIDE_FAILED
-
-  ctypedef enum grpc_ssl_client_certificate_request_type:
-    GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE,
-    GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY
-    GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY
-    GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY
-    GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY
-
-  struct grpc_byte_buffer_reader:
-    # We don't care about the internals
-    pass
-
-  ctypedef struct grpc_byte_buffer:
-    # We don't care about the internals.
-    pass
-
-  grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
-                                                size_t nslices) nogil
-  size_t grpc_byte_buffer_length(grpc_byte_buffer *bb) nogil
-  void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer) nogil
-
-  int grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
-                                   grpc_byte_buffer *buffer) nogil
-  int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                   gpr_slice *slice) nogil
-  void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader) nogil
-
   const char *GRPC_ARG_PRIMARY_USER_AGENT_STRING
   const char *GRPC_ARG_ENABLE_CENSUS
   const char *GRPC_ARG_MAX_CONCURRENT_STREAMS
@@ -353,6 +347,21 @@ cdef extern from "grpc/_cython/loader.h":
   void grpc_server_cancel_all_calls(grpc_server *server) nogil
   void grpc_server_destroy(grpc_server *server) nogil
 
+
+cdef extern from "grpc/grpc_security.h":
+
+  ctypedef enum grpc_ssl_roots_override_result:
+    GRPC_SSL_ROOTS_OVERRIDE_OK
+    GRPC_SSL_ROOTS_OVERRIDE_FAILED_PERMANENTLY
+    GRPC_SSL_ROOTS_OVERRIDE_FAILED
+
+  ctypedef enum grpc_ssl_client_certificate_request_type:
+    GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE,
+    GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY
+    GRPC_SSL_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY
+    GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY
+    GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY
+
   ctypedef struct grpc_ssl_pem_key_cert_pair:
     const char *private_key
     const char *certificate_chain "cert_chain"
@@ -438,6 +447,9 @@ cdef extern from "grpc/_cython/loader.h":
   grpc_call_credentials *grpc_metadata_credentials_create_from_plugin(
       grpc_metadata_credentials_plugin plugin, void *reserved) nogil
 
+
+cdef extern from "grpc/compression.h":
+
   ctypedef enum grpc_compression_algorithm:
     GRPC_COMPRESS_NONE
     GRPC_COMPRESS_DEFLATE
@@ -472,3 +484,4 @@ cdef extern from "grpc/_cython/loader.h":
   int grpc_compression_options_is_algorithm_enabled(
       const grpc_compression_options *opts,
       grpc_compression_algorithm algorithm) nogil
+
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index e055d321bc..a9520b9c0f 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -49,11 +49,18 @@ include "grpc/_cython/_cygrpc/server.pyx.pxi"
 #
 
 
-def _initialize():
-  if not pygrpc_initialize_core():
-    raise ImportError('failed to initialize core gRPC library')
+cdef extern from "Python.h":
+
+  int Py_AtExit(void(*func)())
+
 
+def _initialize():
+  grpc_init()
   grpc_set_ssl_roots_override_callback(
           <grpc_ssl_roots_override_callback>ssl_roots_override_callback)
 
+  if Py_AtExit(grpc_shutdown) != 0:
+    raise ImportError('failed to register gRPC library shutdown callbacks')
+
+
 _initialize()
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.c b/src/python/grpcio/grpc/_cython/imports.generated.c
deleted file mode 100644
index c0080b5a47..0000000000
--- a/src/python/grpcio/grpc/_cython/imports.generated.c
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- *
- * Copyright 2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/* TODO(atash) remove cruft */
-#include <grpc/support/port_platform.h>
-
-#include "imports.generated.h"
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
deleted file mode 100644
index 8e5c9a8ce2..0000000000
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- *
- * Copyright 2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/* TODO(atash) remove cruft */
-#ifndef PYGRPC_CYTHON_WINDOWS_IMPORTS_H_
-#define PYGRPC_CYTHON_WINDOWS_IMPORTS_H_
-
-#include <grpc/support/port_platform.h>
-
-#include <grpc/byte_buffer.h>
-#include <grpc/byte_buffer_reader.h>
-#include <grpc/compression.h>
-#include <grpc/grpc.h>
-#include <grpc/grpc_security.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/slice.h>
-#include <grpc/support/time.h>
-#include <grpc/status.h>
-
-#endif
diff --git a/src/python/grpcio/grpc/_cython/loader.c b/src/python/grpcio/grpc/_cython/loader.c
deleted file mode 100644
index 34bd897549..0000000000
--- a/src/python/grpcio/grpc/_cython/loader.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- *
- * Copyright 2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <Python.h>
-#include "loader.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif  /* __cpluslus  */
-
-int pygrpc_load_core(char *path) { return 1; }
-
-// Cython doesn't have Py_AtExit bindings, so we call the C_API directly
-int pygrpc_initialize_core(void) {
-  grpc_init();
-  return Py_AtExit(grpc_shutdown) < 0 ? 0 : 1;
-}
-
-#ifdef __cplusplus
-}
-#endif  /* __cpluslus */
-
diff --git a/src/python/grpcio/grpc/_cython/loader.h b/src/python/grpcio/grpc/_cython/loader.h
deleted file mode 100644
index 62fd225204..0000000000
--- a/src/python/grpcio/grpc/_cython/loader.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- *
- * Copyright 2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef PYGRPC_LOADER_H_
-#define PYGRPC_LOADER_H_
-
-#include "imports.generated.h"
-
-/* Additional inclusions not covered by "imports.generated.h" */
-#include <grpc/byte_buffer_reader.h>
-
-/* TODO(atash) remove cruft */
-
-#ifdef __cplusplus
-extern "C" {
-#endif  /* __cpluslus */
-
-/* Attempts to load the core if necessary, and return non-zero upon succes. */
-int pygrpc_load_core(char *path);
-
-/* Initializes grpc and registers grpc_shutdown() to be called right before
- * interpreter exit.  Returns non-zero upon success.
- */
-int pygrpc_initialize_core(void);
-
-#ifdef __cplusplus
-}
-#endif  /* __cpluslus */
-
-#endif /* GRPC_RB_BYTE_BUFFER_H_ */
-
diff --git a/src/python/grpcio/grpc/beta/_client_adaptations.py b/src/python/grpcio/grpc/beta/_client_adaptations.py
index 73415e0be7..e4ee44d7a3 100644
--- a/src/python/grpcio/grpc/beta/_client_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_client_adaptations.py
@@ -67,7 +67,7 @@ def _abortion(rpc_error_call):
   error_kind = face.Abortion.Kind.LOCAL_FAILURE if pair is None else pair[0]
   return face.Abortion(
       error_kind, rpc_error_call.initial_metadata(),
-      rpc_error_call.trailing_metadata(), code, rpc_error_code.details())
+      rpc_error_call.trailing_metadata(), code, rpc_error_call.details())
 
 
 def _abortion_error(rpc_error_call):
@@ -159,9 +159,11 @@ class _Rendezvous(future.Future, face.Call):
     return self._call.time_remaining()
 
   def add_abortion_callback(self, abortion_callback):
-    registered = self._call.add_callback(
-        lambda: abortion_callback(_abortion(self._call)))
-    return None if registered else _abortion(self._call)
+    def done_callback():
+      if self.code() is not grpc.StatusCode.OK:
+        abortion_callback(_abortion(self._call))
+    registered = self._call.add_callback(done_callback)
+    return None if registered else done_callback()
 
   def protocol_context(self):
     return _InvocationProtocolContext()
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 6e6513d4a4..da676eff7f 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -81,6 +81,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/channel/channel_stack_builder.c',
   'src/core/lib/channel/compress_filter.c',
   'src/core/lib/channel/connected_channel.c',
+  'src/core/lib/channel/handshaker.c',
   'src/core/lib/channel/http_client_filter.c',
   'src/core/lib/channel/http_server_filter.c',
   'src/core/lib/compression/compression.c',
diff --git a/src/python/grpcio_health_checking/MANIFEST.in b/src/python/grpcio_health_checking/MANIFEST.in
index 7d26647697..7407f646d1 100644
--- a/src/python/grpcio_health_checking/MANIFEST.in
+++ b/src/python/grpcio_health_checking/MANIFEST.in
@@ -1,3 +1,4 @@
+include grpc_version.py
 include health_commands.py
-graft grpc_health
+graft grpc
 global-exclude *.pyc
diff --git a/src/python/grpcio_health_checking/grpc_health/health/v1/__init__.py b/src/python/grpcio_health_checking/grpc/__init__.py
index 7086519106..fcc7048815 100644
--- a/src/python/grpcio_health_checking/grpc_health/health/v1/__init__.py
+++ b/src/python/grpcio_health_checking/grpc/__init__.py
@@ -27,4 +27,4 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-
+__import__('pkg_resources').declare_namespace(__name__)
diff --git a/src/python/grpcio_health_checking/grpc_health/__init__.py b/src/python/grpcio_health_checking/grpc/health/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_health_checking/grpc_health/__init__.py
+++ b/src/python/grpcio_health_checking/grpc/health/__init__.py
diff --git a/src/python/grpcio_health_checking/grpc_health/health/__init__.py b/src/python/grpcio_health_checking/grpc/health/v1/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_health_checking/grpc_health/health/__init__.py
+++ b/src/python/grpcio_health_checking/grpc/health/v1/__init__.py
diff --git a/src/python/grpcio_health_checking/grpc_health/health/v1/health.py b/src/python/grpcio_health_checking/grpc/health/v1/health.py
index 8da60c70cb..8108ac1096 100644
--- a/src/python/grpcio_health_checking/grpc_health/health/v1/health.py
+++ b/src/python/grpcio_health_checking/grpc/health/v1/health.py
@@ -31,10 +31,12 @@
 
 import threading
 
-from grpc_health.health.v1 import health_pb2
+import grpc
 
+from grpc.health.v1 import health_pb2
 
-class HealthServicer(health_pb2.BetaHealthServicer):
+
+class HealthServicer(health_pb2.HealthServicer):
   """Servicer handling RPCs for service statuses."""
 
   def __init__(self):
@@ -43,14 +45,12 @@ class HealthServicer(health_pb2.BetaHealthServicer):
 
   def Check(self, request, context):
     with self._server_status_lock:
-      if request.service not in self._server_status:
-        # TODO(atash): once the Python API has a way of setting the server
-        # status, bring us into conformance with the health check spec by
-        # returning the NOT_FOUND status here.
-        raise NotImplementedError()
+      status = self._server_status.get(request.service)
+      if status is None:
+        context.set_code(grpc.StatusCode.NOT_FOUND)
+        return health_pb2.HealthCheckResponse()
       else:
-        return health_pb2.HealthCheckResponse(
-            status=self._server_status[request.service])
+        return health_pb2.HealthCheckResponse(status=status)
 
   def set(self, service, status):
     """Sets the status of a service.
@@ -63,4 +63,3 @@ class HealthServicer(health_pb2.BetaHealthServicer):
     """
     with self._server_status_lock:
       self._server_status[service] = status
-
diff --git a/src/python/grpcio_health_checking/grpc_version.py b/src/python/grpcio_health_checking/grpc_version.py
new file mode 100644
index 0000000000..be0d0ced3c
--- /dev/null
+++ b/src/python/grpcio_health_checking/grpc_version.py
@@ -0,0 +1,32 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_health_checking/grpc_version.py.template`!!!
+
+VERSION='1.1.0.dev0'
diff --git a/src/python/grpcio_health_checking/health_commands.py b/src/python/grpcio_health_checking/health_commands.py
index a7a59f6974..66df25da63 100644
--- a/src/python/grpcio_health_checking/health_commands.py
+++ b/src/python/grpcio_health_checking/health_commands.py
@@ -29,16 +29,10 @@
 
 """Provides distutils command classes for the GRPC Python setup process."""
 
-import distutils
-import glob
 import os
-import os.path
 import shutil
-import subprocess
-import sys
 
 import setuptools
-from setuptools.command import build_py
 
 ROOT_DIR = os.path.abspath(os.path.dirname(os.path.abspath(__file__)))
 HEALTH_PROTO = os.path.join(ROOT_DIR, '../../proto/grpc/health/v1/health.proto')
@@ -60,12 +54,25 @@ class CopyProtoModules(setuptools.Command):
     if os.path.isfile(HEALTH_PROTO):
       shutil.copyfile(
           HEALTH_PROTO,
-          os.path.join(ROOT_DIR, 'grpc_health/health/v1/health.proto'))
+          os.path.join(ROOT_DIR, 'grpc/health/v1/health.proto'))
 
 
-class BuildPy(build_py.build_py):
-  """Custom project build command."""
+class BuildPackageProtos(setuptools.Command):
+  """Command to generate project *_pb2.py modules from proto files."""
+
+  description = 'build grpc protobuf modules'
+  user_options = []
+
+  def initialize_options(self):
+    pass
+
+  def finalize_options(self):
+    pass
 
   def run(self):
-    self.run_command('build_proto_modules')
-    build_py.build_py.run(self)
+    # due to limitations of the proto generator, we require that only *one*
+    # directory is provided as an 'include' directory. We assume it's the '' key
+    # to `self.distribution.package_dir` (and get a key error if it's not
+    # there).
+    from grpc.tools import command
+    command.build_package_protos(self.distribution.package_dir[''])
diff --git a/src/python/grpcio_health_checking/setup.py b/src/python/grpcio_health_checking/setup.py
index 70b4575bf5..727d628885 100644
--- a/src/python/grpcio_health_checking/setup.py
+++ b/src/python/grpcio_health_checking/setup.py
@@ -30,49 +30,42 @@
 """Setup module for the GRPC Python package's optional health checking."""
 
 import os
-import os.path
 import sys
 
-from distutils import core as _core
 import setuptools
 
-import grpc.tools.command
-
 # Ensure we're in the proper directory whether or not we're being used by pip.
 os.chdir(os.path.dirname(os.path.abspath(__file__)))
 
 # Break import-style to ensure we can actually find our commands module.
 import health_commands
-
-PACKAGES = (
-    setuptools.find_packages('.')
-)
+import grpc_version
 
 PACKAGE_DIRECTORIES = {
     '': '.',
 }
 
 SETUP_REQUIRES = (
-    'grpcio-tools>=0.14.0',
+    'grpcio-tools>=0.15.0',
 )
 
 INSTALL_REQUIRES = (
-    'grpcio>=0.13.1',
+    'grpcio>=0.15.0',
 )
 
 COMMAND_CLASS = {
     # Run preprocess from the repository *before* doing any packaging!
     'preprocess': health_commands.CopyProtoModules,
-
-    'build_proto_modules': grpc.tools.command.BuildProtoModules,
-    'build_py': health_commands.BuildPy,
+    'build_package_protos': health_commands.BuildPackageProtos,
 }
 
 setuptools.setup(
     name='grpcio-health-checking',
-    version='0.14.0',
-    packages=list(PACKAGES),
+    version=grpc_version.VERSION,
+    license='3-clause BSD',
     package_dir=PACKAGE_DIRECTORIES,
+    packages=setuptools.find_packages('.'),
+    namespace_packages=['grpc'],
     install_requires=INSTALL_REQUIRES,
     setup_requires=SETUP_REQUIRES,
     cmdclass=COMMAND_CLASS
diff --git a/src/python/grpcio_tests/commands.py b/src/python/grpcio_tests/commands.py
index 171829b62f..5ee551cfe1 100644
--- a/src/python/grpcio_tests/commands.py
+++ b/src/python/grpcio_tests/commands.py
@@ -138,7 +138,7 @@ class BuildPy(build_py.build_py):
 
   def run(self):
     try:
-      self.run_command('build_proto_modules')
+      self.run_command('build_package_protos')
     except CommandError as error:
       sys.stderr.write('warning: %s\n' % error.message)
     build_py.build_py.run(self)
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 7eef420bdb..0afaf7dfa2 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -75,7 +75,7 @@ COMMAND_CLASS = {
     # Run `preprocess` *before* doing any packaging!
     'preprocess': commands.GatherProto,
 
-    'build_proto_modules': grpc.tools.command.BuildProtoModules,
+    'build_package_protos': grpc.tools.command.BuildPackageProtos,
     'build_py': commands.BuildPy,
     'run_interop': commands.RunInterop,
     'test_lite': commands.TestLite
diff --git a/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py b/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py
index 1b63388663..80300d13df 100644
--- a/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py
+++ b/src/python/grpcio_tests/tests/health_check/_health_servicer_test.py
@@ -27,48 +27,68 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""Tests of grpc_health.health.v1.health."""
+"""Tests of grpc.health.v1.health."""
 
 import unittest
 
-from grpc_health.health.v1 import health
-from grpc_health.health.v1 import health_pb2
+import grpc
+from grpc.framework.foundation import logging_pool
+from grpc.health.v1 import health
+from grpc.health.v1 import health_pb2
+
+from tests.unit.framework.common import test_constants
 
 
 class HealthServicerTest(unittest.TestCase):
 
   def setUp(self):
-    self.servicer = health.HealthServicer()
-    self.servicer.set('', health_pb2.HealthCheckResponse.SERVING)
-    self.servicer.set('grpc.test.TestServiceServing',
-                      health_pb2.HealthCheckResponse.SERVING)
-    self.servicer.set('grpc.test.TestServiceUnknown',
-                      health_pb2.HealthCheckResponse.UNKNOWN)
-    self.servicer.set('grpc.test.TestServiceNotServing',
-                      health_pb2.HealthCheckResponse.NOT_SERVING)
+    servicer = health.HealthServicer()
+    servicer.set('', health_pb2.HealthCheckResponse.SERVING)
+    servicer.set('grpc.test.TestServiceServing',
+                 health_pb2.HealthCheckResponse.SERVING)
+    servicer.set('grpc.test.TestServiceUnknown',
+                 health_pb2.HealthCheckResponse.UNKNOWN)
+    servicer.set('grpc.test.TestServiceNotServing',
+                 health_pb2.HealthCheckResponse.NOT_SERVING)
+    server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+    self._server = grpc.server(server_pool)
+    port = self._server.add_insecure_port('[::]:0')
+    health_pb2.add_HealthServicer_to_server(servicer, self._server)
+    self._server.start()
+
+    channel = grpc.insecure_channel('localhost:%d' % port)
+    self._stub = health_pb2.HealthStub(channel)
 
   def test_empty_service(self):
     request = health_pb2.HealthCheckRequest()
-    resp = self.servicer.Check(request, None)
-    self.assertEqual(resp.status, health_pb2.HealthCheckResponse.SERVING)
+    resp = self._stub.Check(request)
+    self.assertEqual(health_pb2.HealthCheckResponse.SERVING, resp.status)
 
   def test_serving_service(self):
     request = health_pb2.HealthCheckRequest(
         service='grpc.test.TestServiceServing')
-    resp = self.servicer.Check(request, None)
-    self.assertEqual(resp.status, health_pb2.HealthCheckResponse.SERVING)
+    resp = self._stub.Check(request)
+    self.assertEqual(health_pb2.HealthCheckResponse.SERVING, resp.status)
 
   def test_unknown_serivce(self):
     request = health_pb2.HealthCheckRequest(
         service='grpc.test.TestServiceUnknown')
-    resp = self.servicer.Check(request, None)
-    self.assertEqual(resp.status, health_pb2.HealthCheckResponse.UNKNOWN)
+    resp = self._stub.Check(request)
+    self.assertEqual(health_pb2.HealthCheckResponse.UNKNOWN, resp.status)
 
   def test_not_serving_service(self):
     request = health_pb2.HealthCheckRequest(
         service='grpc.test.TestServiceNotServing')
-    resp = self.servicer.Check(request, None)
-    self.assertEqual(resp.status, health_pb2.HealthCheckResponse.NOT_SERVING)
+    resp = self._stub.Check(request)
+    self.assertEqual(health_pb2.HealthCheckResponse.NOT_SERVING, resp.status)
+
+  def test_not_found_service(self):
+    request = health_pb2.HealthCheckRequest(
+        service='not-found')
+    with self.assertRaises(grpc.RpcError) as context:
+      resp = self._stub.Check(request)
+  
+    self.assertEqual(grpc.StatusCode.NOT_FOUND, context.exception.code())
 
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py b/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
index d32208f9eb..df620b19ba 100644
--- a/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
+++ b/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
@@ -434,11 +434,13 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = _Callback()
+        abortion_callback = _Callback()
 
         with self._control.fail():
           response_future = self._invoker.future(group, method)(
               request, _3069_test_constant.REALLY_SHORT_TIMEOUT)
           response_future.add_done_callback(callback)
+          response_future.add_abortion_callback(abortion_callback)
 
           self.assertIs(callback.future(), response_future)
           # Because the servicer fails outside of the thread from which the
@@ -450,6 +452,7 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
           with self.assertRaises(face.ExpirationError):
             response_future.result()
           self.assertIsNotNone(response_future.traceback())
+          self.assertIsNotNone(abortion_callback.future())
 
   def testFailedUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -472,11 +475,13 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = _Callback()
+        abortion_callback = _Callback()
 
         with self._control.fail():
           response_future = self._invoker.future(group, method)(
               iter(requests), _3069_test_constant.REALLY_SHORT_TIMEOUT)
           response_future.add_done_callback(callback)
+          response_future.add_abortion_callback(abortion_callback)
 
           self.assertIs(callback.future(), response_future)
           # Because the servicer fails outside of the thread from which the
@@ -488,6 +493,7 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
           with self.assertRaises(face.ExpirationError):
             response_future.result()
           self.assertIsNotNone(response_future.traceback())
+          self.assertIsNotNone(abortion_callback.future())
 
   def testFailedStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index 18a15d0125..e6d30a174b 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -40,6 +40,7 @@
 #include <grpc/grpc_security.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/time.h>
 #include "rb_grpc.h"
 #include "rb_call.h"
 #include "rb_channel_args.h"
@@ -71,6 +72,7 @@ typedef struct grpc_rb_channel {
 
   /* The actual channel */
   grpc_channel *wrapped;
+  grpc_completion_queue *queue;
 } grpc_rb_channel;
 
 /* Destroys Channel instances. */
@@ -83,6 +85,7 @@ static void grpc_rb_channel_free(void *p) {
 
   if (ch->wrapped != NULL) {
     grpc_channel_destroy(ch->wrapped);
+    grpc_rb_completion_queue_destroy(ch->queue);
   }
 
   xfree(p);
@@ -165,6 +168,7 @@ static VALUE grpc_rb_channel_init(int argc, VALUE *argv, VALUE self) {
   }
   rb_ivar_set(self, id_target, target);
   wrapper->wrapped = ch;
+  wrapper->queue = grpc_completion_queue_create(NULL);
   return self;
 }
 
@@ -203,16 +207,18 @@ static VALUE grpc_rb_channel_get_connectivity_state(int argc, VALUE *argv,
    the completion queue with success=0 */
 static VALUE grpc_rb_channel_watch_connectivity_state(VALUE self,
                                                       VALUE last_state,
-                                                      VALUE cqueue,
-                                                      VALUE deadline,
-                                                      VALUE tag) {
+                                                      VALUE deadline) {
   grpc_rb_channel *wrapper = NULL;
   grpc_channel *ch = NULL;
   grpc_completion_queue *cq = NULL;
 
-  cq = grpc_rb_get_wrapped_completion_queue(cqueue);
+  void *tag = wrapper;
+
+  grpc_event event;
+
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
   ch = wrapper->wrapped;
+  cq = wrapper->queue;
   if (ch == NULL) {
     rb_raise(rb_eRuntimeError, "closed!");
     return Qnil;
@@ -222,9 +228,16 @@ static VALUE grpc_rb_channel_watch_connectivity_state(VALUE self,
       (grpc_connectivity_state)NUM2LONG(last_state),
       grpc_rb_time_timeval(deadline, /* absolute time */ 0),
       cq,
-      ROBJECT(tag));
+      tag);
 
-  return Qnil;
+  event = rb_completion_queue_pluck(cq, tag,
+                                    gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+
+  if (event.success) {
+    return Qtrue;
+  } else {
+    return Qfalse;
+  }
 }
 
 /* Create a call given a grpc_channel, in order to call method. The request
diff --git a/src/ruby/ext/grpc/rb_completion_queue.h b/src/ruby/ext/grpc/rb_completion_queue.h
index 9f8f6aa5ff..aa9dc6416a 100644
--- a/src/ruby/ext/grpc/rb_completion_queue.h
+++ b/src/ruby/ext/grpc/rb_completion_queue.h
@@ -38,9 +38,6 @@
 
 #include <grpc/grpc.h>
 
-/* Gets the wrapped completion queue from the ruby wrapper */
-grpc_completion_queue *grpc_rb_get_wrapped_completion_queue(VALUE v);
-
 void grpc_rb_completion_queue_destroy(grpc_completion_queue *cq);
 
 /**
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 9748cb576b..d7f862cd9c 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -186,6 +186,7 @@ gpr_set_log_function_type gpr_set_log_function_import;
 gpr_slice_ref_type gpr_slice_ref_import;
 gpr_slice_unref_type gpr_slice_unref_import;
 gpr_slice_new_type gpr_slice_new_import;
+gpr_slice_new_with_user_data_type gpr_slice_new_with_user_data_import;
 gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
 gpr_slice_malloc_type gpr_slice_malloc_import;
 gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
@@ -458,6 +459,7 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_slice_ref_import = (gpr_slice_ref_type) GetProcAddress(library, "gpr_slice_ref");
   gpr_slice_unref_import = (gpr_slice_unref_type) GetProcAddress(library, "gpr_slice_unref");
   gpr_slice_new_import = (gpr_slice_new_type) GetProcAddress(library, "gpr_slice_new");
+  gpr_slice_new_with_user_data_import = (gpr_slice_new_with_user_data_type) GetProcAddress(library, "gpr_slice_new_with_user_data");
   gpr_slice_new_with_len_import = (gpr_slice_new_with_len_type) GetProcAddress(library, "gpr_slice_new_with_len");
   gpr_slice_malloc_import = (gpr_slice_malloc_type) GetProcAddress(library, "gpr_slice_malloc");
   gpr_slice_from_copied_string_import = (gpr_slice_from_copied_string_type) GetProcAddress(library, "gpr_slice_from_copied_string");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 6f0974e31b..14da63780c 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -509,6 +509,9 @@ extern gpr_slice_unref_type gpr_slice_unref_import;
 typedef gpr_slice(*gpr_slice_new_type)(void *p, size_t len, void (*destroy)(void *));
 extern gpr_slice_new_type gpr_slice_new_import;
 #define gpr_slice_new gpr_slice_new_import
+typedef gpr_slice(*gpr_slice_new_with_user_data_type)(void *p, size_t len, void (*destroy)(void *), void *user_data);
+extern gpr_slice_new_with_user_data_type gpr_slice_new_with_user_data_import;
+#define gpr_slice_new_with_user_data gpr_slice_new_with_user_data_import
 typedef gpr_slice(*gpr_slice_new_with_len_type)(void *p, size_t len, void (*destroy)(void *, size_t));
 extern gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
 #define gpr_slice_new_with_len gpr_slice_new_with_len_import
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index 425dc3e519..c2ac3c4daf 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -76,7 +76,7 @@ module GRPC
     # block that can be invoked with each response.
     #
     # @param requests the Enumerable of requests to send
-    # @op_notifier a Notifier used to signal completion
+    # @param op_notifier a Notifier used to signal completion
     # @return an Enumerator of requests to yield
     def run_on_client(requests, op_notifier, &blk)
       @op_notifier = op_notifier
diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index 9d6bd3bf59..0d7c1f7805 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -34,7 +34,8 @@ require_relative '../version'
 module GRPC
   # rubocop:disable Metrics/ParameterLists
 
-  # ClientStub represents an endpoint used to send requests to GRPC servers.
+  # ClientStub represents a client connection to a gRPC server, and can be used
+  # to send requests.
   class ClientStub
     include Core::StatusCodes
     include Core::TimeConsts
@@ -75,8 +76,9 @@ module GRPC
     # my_stub = ClientStub.new(example.host.com:50505,
     #                          :this_channel_is_insecure)
     #
-    # Any arbitrary keyword arguments are treated as channel arguments used to
-    # configure the RPC connection to the host.
+    # If a channel_override argument is passed, it will be used as the
+    # underlying channel. Otherwise, the channel_args argument will be used
+    # to construct a new underlying channel.
     #
     # There are some specific keyword args that are not used to configure the
     # channel:
@@ -91,10 +93,17 @@ module GRPC
     #
     # @param host [String] the host the stub connects to
     # @param creds [Core::ChannelCredentials|Symbol] the channel credentials, or
-    #     :this_channel_is_insecure
+    #     :this_channel_is_insecure, which explicitly indicates that the client
+    #     should be created with an insecure connection. Note: this argument is
+    #     ignored if the channel_override argument is provided.
     # @param channel_override [Core::Channel] a pre-created channel
     # @param timeout [Number] the default timeout to use in requests
-    # @param channel_args [Hash] the channel arguments
+    # @param propagate_mask [Number] A bitwise combination of flags in
+    #     GRPC::Core::PropagateMasks. Indicates how data should be propagated
+    #     from parent server calls to child client calls if this client is being
+    #     used within a gRPC server.
+    # @param channel_args [Hash] the channel arguments. Note: this argument is
+    #     ignored if the channel_override argument is provided.
     def initialize(host, creds,
                    channel_override: nil,
                    timeout: nil,
@@ -389,11 +398,11 @@ module GRPC
     # @param marshal [Function] f(obj)->string that marshals requests
     # @param unmarshal [Function] f(string)->obj that unmarshals responses
     # @param deadline [Time] (optional) the time the request should complete
+    # @param return_op [true|false] return an Operation if true
     # @param parent [Core::Call] a prior call whose reserved metadata
     #   will be propagated by this one.
     # @param credentials [Core::CallCredentials] credentials to use when making
     #   the call
-    # @param return_op [true|false] return an Operation if true
     # @param metadata [Hash] metadata to be sent to the server
     # @param blk [Block] when provided, is executed for each response
     # @return [Enumerator|nil|Operation] as discussed above
@@ -430,7 +439,8 @@ module GRPC
     # @param unmarshal [Function] f(string)->obj that unmarshals responses
     # @param parent [Grpc::Call] a parent call, available when calls are
     #   made from server
-    # @param timeout [TimeConst]
+    # @param credentials [Core::CallCredentials] credentials to use when making
+    #   the call
     def new_active_call(method, marshal, unmarshal,
                         deadline: nil,
                         parent: nil,
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index c92a532a50..7ea2371365 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -172,22 +172,18 @@ module GRPC
     # The RPC server is configured using keyword arguments.
     #
     # There are some specific keyword args used to configure the RpcServer
-    # instance, however other arbitrary are allowed and when present are used
-    # to configure the listeninng connection set up by the RpcServer.
-    #
-    # * poll_period: when present, the server polls for new events with this
-    # period
+    # instance.
     #
     # * pool_size: the size of the thread pool the server uses to run its
     # threads
     #
-    # * creds: [GRPC::Core::ServerCredentials]
-    # the credentials used to secure the server
-    #
     # * max_waiting_requests: the maximum number of requests that are not
     # being handled to allow. When this limit is exceeded, the server responds
     # with not available to new requests
     #
+    # * poll_period: when present, the server polls for new events with this
+    # period
+    #
     # * connect_md_proc:
     # when non-nil is a proc for determining metadata to to send back the client
     # on receiving an invocation req.  The proc signature is: